For Mac Users (this may have been said already) I finally found a way to run WinISD. Wine and WinBottler are free programs that have been recommenced to run WinISD without the hassle of virtual machines, bootcamp, parallels, etc. But for me, both of those program wouldn't run properly but simply not opening, or quitting/crashing when trying to load WinISD under advance options, respectively. Nearly giving up, I found Wine-Stable (Wine-Stable 7 the most recent version, but Wine-Stable 5 is what worked for me. I could be wrong, but during install I selected both 32 bit and 64 bit as an option. After installing Wine-Stable 5, I am finally able to run WinISD on my Macbook Pro, without having to pay for a windows subscription. I hope this helps anyone with a Mac!
I've been using winisd for quite some time. And I know all the points you said. But still I love to watch this video often 😂😂😂😂😂 ur explanation is energetic and engaging !!!! Great job !!! 👍👍👍
You provided me so much information thank you. I have a prefab tswx300a and i added an external port with pvc pipe😂 i know its a frankenstein build but i can hit lower frequency now its a new box tuned to 28hz ( yes its a long port ). I never took the time to thank you for all your amazing work and your knowledge sharing . Salute from Paris. I might start upload my bass head journey😅
Your subsonic filter can greatly reduce air velocity which allows the use of a smaller port. I set my subsonic filter at the subs f3, but some also recommend setting at 2-3Hz below tuning, or one half octave below tuning.
That's a good point. I've got a video on setting an account infrasonic filter, I never thought about the impact the filter would have on port noise. But if you're cutting the signal you're going to be cutting the port noise as well. th-cam.com/video/iWRoIho7A7c/w-d-xo.html
A few hz below tuning is still cutting audible frequencies , a ported enclosure still plays below tuning , my box is tuned at 33hz but I still get audible notes at 28hz no way I would cut it at 32 or 31hz......imhave mine set at about 20-22hz that's much more reasonable
@7 Logik Well it also depends on the slope (6db, 12db, 24db, etc.) applied power, type of subs, enclosure size, and type of music you're playing (Rock, Hip Hop, Rebassed, etc.). The crossover filter doesn't just abruptly cut off frequencies, but it rolls them off at a given rate depending on the slope. So with a 33Hz tuning if the filter was set at 30Hz with a 12dB slope you would still be able to play 28Hz with no problem. The lowest recommended is 1/2 octave below tuning which would be 24.75Hz at 33Hz tuned.
Loving your video's, 3rd one in a row. Great work! WinISD is something I'm still learning myself, people like you and some others have been cool enough to break it down a little more for me. Appreciated!
LoudSpeakerDatabase is also a fantastic source for T/S Parameters (as it already has pre-populated files!), but it's user contributed so there's a bit of lag between new drivers and files being available.
@@DIYAudioGuy It's great for people like me who always mess up the "order on entering the specs" or who struggle to find specs for certain drivers. It's sooo helpful when it's already there and all I have to do is click the "WinISD" link and download the file. I look forward to hearing your thoughts on it.
Thank You so much for telling I spent 30 min entering the parameters it worked in the end but I'll still use LSD. Should have read this comment before doing lol
I'm so glad I found your channel. How did I not know about it sooner? Lots of technical stuff which I love. One question I have or would like to see a demonstration of is dampening or dampening factor. How ohm load effects it and spl/SQ and such.
I am not an expert on amplifiers, but from what I gathere damping factor is a way to express how well an amplifier controls the cone movement. It's one of those things that's important up to a point. Like everything else with audio there are diminishing returns.
@@DIYAudioGuy appreciate the reply. Its one of those im not even sure if or how they can measure it. Strage thing I've noticed when playing with the meter is that seems good damping seems more efficient with spl. Ya you can gain a db going to half ohm or whatever. But at the cost of 2x the amperage draw and sloppy cone control. but also not the case always.
I always try to express the importance of high damping factor when playing low frequencies it’s basically the amplifiers ability to control the incoming eddy currents
Well explained. i had this sofware and deleted it now i going to re install i been searching months for info like this i learned everything in this video thanks my speaker is new on the market so i had a very hard time getting the correct box
Thanks for your videos! Using WINISD I learned that my particular subwoofer will play louder in all low bass frequencies in a smaller(1cu ft) sealed enclosure than in a 1.5cu ft. ported one. The TS of my sub indicated that it leans more towards a sealed sub than ported so this makes sense. The math doesn't lie as long as all the subwoofer information is properly filled in! Also I had port velocities up to 30m/s at tuning with the ported which isn't terrible but definitely not optimal. I just wish I could share my graphs.
Interesting, I designed a 3 GHz RF cavity with tuning ports called re entrant cavities back in the 1990s. I used it for an electron positron accelerator at SLAC while I was at Stanford back in the day. I used it to smash sub atomic particles while you smash air molecules!
I appreciate all the content you put out for us. (yes I know this was put up long ago) You make inputting the Thiele Small parameters look so easy. I'm not sure if I'm doing something wrong or if I don't have all the necessary info. After several attempts I'm still getting the dreaded red bar when trying to load the sub. Looks like its back to old school paper and pencil work for me.
I had the same issue with the latest version on widows 10. I ended up installing the older Alpha Pro 5.0 version. Rarely have issues other than manufacturers listing conflicting values in which case I only enter the bare minimum. I actually like the older version GUI better.
Winisd is great WHEN you can get the parameters correct in the correct order! That is always the frustrating part for me.Or when all the data is entered and winisd says it's wrong.But when it works, it is awesome!!
@@DIYAudioGuy Maybe I have a real old version. It flat out will not let me continue when its is not all 100% correct.Ill delete and re-install and try that. Really is a insane FREE program!
@@jondoe6618 I think there is an article on Home Theater Shack that tells you how (in terms of the order) that you enter the parameters in order to get it to work. Tried everything but this article worked for me Finally.
I am glad you subbed! One of my first builds was a PR, I have been tinkering with them off an on. Here is an experiment that I tried: th-cam.com/video/6AShG7ozRsI/w-d-xo.html It failed because the PR's came unglued. THis was version 2.0, it was MUCH better. Ended up being tuned to 22HZ. That little 10 was killing those lows. th-cam.com/video/WWNQZzwcbBM/w-d-xo.html
Note on T/S parameters that I believe you have covered in another video but did not mention here; the mighty DATS! I love mine and for folks who play around with older or oddball subs the DATS is great for getting a set of T/S parameters to base your build on. Thanks for the great video!
Hello @DIYAudiGuy, start off by saying I love and enjoy your videos! I have learned a lot by watching you and has taken my box designing to the next level. Made me feel so comfortable, I started taking on building for people. Question, I have a guy that has Nemesis Audio na12e v.3 subs, and I cannot find all parameters to get a green flag from WINISD. Is there a video on this, or a way around it? Any help would be much appreciated.
It can def be a challenge. I had the older version on my other laptop. Downloaded this version n I believe it to be a little less complicated than the older version
Really appreciate the information on this subject and more.I have learned a lot from your videos and cleared up all the noise from friends sending me in every direction except the correct one.Math doesn't lie. Thanks
After my $3000 JL e-110 failed, I`m looking at alternatives, I still have a good driver and enclosure, this may be one way I can fix the lack of bass in my system.
Great video! When entering the watts, do I use 80% of RMS? When I enter 75% of RMS my cone excursion is within limits but outside the limits at 80% of RMS. I am thinking I should be fine but what say you?
When you tune it lower the peak SPL will go down. There is a trade-off between efficiency and low frequency extension for a new given box size.th-cam.com/video/A9oVxddE2GA/w-d-xo.html
WinISD accepted Hifonics Zeus ZXS-15D2 Xmax 26mm peak, but not 14mm linear Xmax. When i did use xlim 26mm and xmax 14 then the integrity check was all good. Its like math classes i hated :D
Does it matter where we put the vent on the box? That is, a foot above the bottom in the middle of the back panel? A few inches from the bottom? Thanks. Great videos.
@@DIYAudioGuy thanks man. So basically programs like WINisd have made it so almost anyone can make a great sounding vented box? The most Important things to look at are port velocity, driver excursion and to have a smooth response? Thanks again
Thank you so much! Your content is super great. I'm having a problem getting "green" with my entry level subs (massive audio TKO 124) Do you offer plans for boxes? If so, how can I get you my info so we can move forward?
Looks like a cool program! Never tried it but I'm gonna have to get a computer so I can use something like this for designing speakers! (Only internet access I have rn is my phone which I'm writing this comment on.)
The good news is that it's a very old program so you don't need a new or fast computer. As long as you're running Windows it'll work. Avoid things like Chromebooks.
If you would, could you make a video explaining the differences between the older versions of winisd vs the new one (one youre using). I have only ever run an older version (0.44) and it is a completely different than the new one you just showed. Part of the reason being that the new one's auto fill for the T/S parameters screws up sometimes. Manufacturer will have one spec one way and winisd will say its wrong. Other than that I didnt know the new version has an excursion chart which I desperately wanted after using Hornresp (also another program you should touch on).
Love your videos! So easy to digest the information. Do you still help Patreon members with box designs? Looking for a second opinion on a design I received. Thanks!
I have a quick question I'm hoping you can help with. When adjusting my port size as a sphere, it won't let me adjust the length, just the diameter. The length is in gray and won't let me click it. If I change to a vent, I can adjust both sizes with no issue. Any ideas would be much appreciated.
It could be anything, it could be down to a rounding error or the parameters provided to you by the manufacturer might be wrong. When I enter my parameters I'm always very careful to make sure that the software has an opportunity to auto-calculate. Take the QTS, QMS and QES. WINisd Will let you enter in all three, I enter two of them, and then click in some other random field and the software will update. But if I enter the first two and then click on the third one and type it in then the software will not auto calculate. Hope that helps.
@@DIYAudioGuy yeah I thought so too. It seems the integrity check has no tolerance on the computed parameters, if you enter too many it will fail due to rounding.
Is the rear port the same as a front port? Because for me the winisd Works only for the rear but i want a front or from the Side. So can i use the same measurements?
For the life of me I cannot enter the T/S parameters of a Sundown Zv6 12" without receiving an integrity check error within Winisd. I've allowed it to auto calculate as well as followed the help guide provided within Winisd with no success. The SD parameter is absent from the sundown site, I'm not sure if that is contributing to integrity failure. Any suggestions would be greatly appreciated!
hello good night, great video. I would like to know if the calculation that winisd makes of the box, if the space that the speaker and the duct occupies is already included. Thanks
Hello! Query, the liters of the box that the software indicates in Item "BOX" are net internal liters or do we have to discount reinforcements, displacements of the sub, port, etc? Greetings! Thank you very much for the video
When you say flare the port end, do you mean just simply rounding off the port ends with sandpaper or router bit, or are you talking about using aero ports?
I was specifically referring to arero ports. But I have found that rounding off the port with a router bit is very effective at cutting down port noise.
Hey DIY Audio Guy, I need help! A buddy of mine works at Kipsch and he gave me a beefy 15" prototype. He didn't have the parameters on hand, but I have the DATs v3 so I wasn't that concerned. I entered everything in WinISD, no issues, but is there an ideal frequency that you tune a home theater box to? WinISD popped out a tuning frequency of 18 hrtz in a box size of 5.3 cbft. That seems awfully low to tune a box to. I've done this with a few other subs, but they were each tuned to 24 and 25 hrtz, but most videos I've watched on port tuning, and WinISD, most people seem to be setting their frequency in the 30's. I was wondering if you had any advice on what you would tune a 15" to. I understand it depends on the bass curve and all that, but you surely have an opinion on what you'd tune your home theater subwoofers to. Ok, don't hold back, hit me with both barrels,...lol.
For home theater, I like to tune the enclosure as flat as possible with as much low end extension as I can get while still keeping it flat. That typically means a very low tuning frequency and a very big box.
I have another possibly silly question. If the auto fill parameter in blue is drastically different than what the manufacturer posts, do you change it or leave it with the auto filled calculation?
Hello for me my driver failed the integrety test, but also all the drivers that are already loaded in the program, what can i do? I have a Beyma 12LX60V2 driver...
Hello im struggeling to get the right slot port dimentions for my beyma 12LX60V2 do you have any suggestions to calculate this(not winISD)... Thanks...
great video .......i was looking at the crescendo forte 15 or 18 inch subwoofer....could these be tuned to 20 or 25 hz ...?..i would like to use them in hometheater.....thanks
I designed a box to 25Hz but to get the port noise down I selected the option to use 2 ports. Winisd says the ports need to be 69cm long, does this mean I need 2x 69cm long ports or is it 2x35cm ports? The length of the port doesnt change in Winisd based on the number of ports used so I dont know if I need the total length of all the ports combined to be what Winisd recommends or if they all need to be the full 69cm length.
I tried to follow along with an Alpine SWS-12D2 but the volume never gets auto populated and no response graph shows up. :( I am sure it is because I can't find all the fields required. Ah, if I edit the driver in the project and set Vas it graphs for me, not sure why it doesn;t bring the Vas from the driver I created. This seems much more difficult to use than bassbox pro granted I have never used bassbox pro for much so IDK if they are similar in functionaliity.
I feel like you should have put a little more time into the part where you enter the parameters. I really recommend Toids video on that matter. Inputting data is very frustrating if you don't know in which order you have to plug in the values.
@@DIYAudioGuy Oh yea totally sorry I didn't mean the order. I meant that it is easiest if you go by a certain scheme. The scheme toid showed always yielded a good result for me
@@DIYAudioGuy In _my_ experience, having the software do the auto calculations is exactly what causes issues. Small "workaround" tricks that I've learned: 1.) Entering values in any other tab than the "Parameters" section can trigger an error, so while less "information about the naming of the speaker" will be available, keeping that info out allows for less erroring. 2.) After every value put in, regardless of the order in which you enter them, attempt to "Save" the project (you don't actually _have to_ save, just click the button to see if an error comes up that'd prevent you from being able to save). Then, backing out of the save and entering in your next value... This procedure can show you exactly when, where, and how the program doesn't like something you've done, and you can start to get a feel for what _not_ to do in the future to avoid errors from happening, like enabling "auto calculate".
I’m new to the winisd, watched your video and went trough the sssteps needed to create the profile and box design . Now how do I get that to paper. I’m a construction worker so I know how to build the box itself but how do I apply the program to paper ? Please help .
Convert to cuin by multiplying by 1728 (say 2 cuft * 1728 = 3456 cuin). Then pick to dimensions (ie. 12" tall and 24" wide) Multiply those together (288). Then divide (3456/288) to get the depth (12). Hope that helps.
How many decimal places does the unit conversion need? I cannot get the checksum to pass no matter what I do. Had the same problem last time I tried WinISD years and years ago, and it seems it's still an issue. Incredibly frustrating; everyone always talks about how useful and powerful the program is, and I'd love to not have to do everything with pencil and paper like I have for the last 30 years... :(
Hi ... Please make a video on adding room gain and parametric EQ filters in winisd. Both for sealed and ported simulations. And even after adding filters cone excurtion should be in limits.
@@DIYAudioGuy in some cases I saw that just after adding room gain filter, cone excurtion went up crazy 😂😂 !!!! I dont think that happens in real world. I mean, cone excurtion may not behave completely different when the sub is in an open space Vs closed room. Or winisd is estimating wrong. Need to investigate further...
dear audioguy, can u do a correlation video regarding vented boxes: correlation between transmissionline;bassreflex;horn cuz port length does in fact matter due to the resonace fq but in a non linear but expo port aka horn how do i calculate that eg. big W bin is combo port with horn
Hey I've got a question about winisd. I've been designing and comparing boxes for my next trunk build and I'm a bit confused. Does/can winisd account for port placement? There's a big difference in port+subs facing forwards compared to only one or the other facing forwards when squeezing two 15s into a trunk. As I understand it the air pressure/sound wave coming from your port will synchronize or become in phase with the pressure/wave coming from the front of your driver and give you a bass boost. Is there a way to know or graph when these waves become In and out of phase? Does this effect still take place when your port is not facing the same direction as your subs, would it change the frequency at which the waves become in phase?
WinISD assumes that you are in a very large room and it does not provide any information about port location. The box size is net, meaning it does not take into account port displacement.
Honestly i have a lot of trouble in this area. I really need a custom box but completely suck at getting the right size that fits. Also I've used mostly sealed enclosures since the 90s. The last few years im using ported an to me they are not producing the bass i was getting back then. Yet i hear these ported enclosures are supposed to offer up more bass. Definitely not from prefabs.
The conventional wisdom is to tune a bit higher or go with the sealed enclosure if you like that kind of music. My personal preferences to tune for a flat frequency response and a low f3, that way it sounds good no matter what music you have to be playing at the moment. But that's just me.
@@DIYAudioGuy Right on! Iv'e got a rockford T216, and been scratching my head on where to even start. Your videos are helping point me in the right direction though!
When you are looking at the different volumes/tuning frequencies, how are you making that adjustment without typing a number into the boxes? Are you doing a mouse scroll or using arrow keys? Starting around 7:19
You can adjust the box volume by clicking on the picture of the box and moving them mouse, or put your cursor in the input boxes and then use the arrow keys.
I tried working with this application. Everything went fine with plugging in the parameters. But then when I opened the project and went to modify the volume of the box, I got an error “invalid floating point operation. Press ok to continue and risk data corruption or cancel.” I clicked ok either way but the graph disappears and I can’t do nothing else on the application. I already tried updating my drivers, but to no avail. I’m running windows 11 pro i7… is there some special processor I need or???
What’s the difference between the rear and front air velocity? Also what’s the x max for the audiopipe bdc4-12? It’s listed @17mm but also says 50mm pk pk. I entered 17mm in winisd.
Unfortunately ti looks like WinISD doesn't take Le or semi-inductance into consideration, both of which will appreciably change the response at bass frequencies for today's long x-max, high-power car audio woofers, particularly if they don't have "shorting rings" in the motor. That's why I prefer to use Hornresp for design work. Hornresp is a bit more difficult to understand though - which is why I developed my BOXPLAN Excel workbooks - just choose the one that matches the box you'd like to build, and it chucks out the corresponding Hornresp parameters :-)
I have a pair of old school stroker 18ds. It turns red when I load the t/s parameters.I am not sure what I need to do to continue. Thanks for your help
Other than just going through it kind of slowly and giving it a chance to auto calculate there's not much you can do. Fortunately it seems like the software can operate when the parameter integrity check fails.
Is there any reason you don’t do a 1” slot instead of 2”? I’m seeing length cut in half when I do that. Messing around w winisd, the changes I make seem counter intuitive, or too good to be true for my application
So, Im thinking of building a small Cube Box for a 6 1/2" Woofer with two matching Passive Radiators. Does WinISD have a calc for this or is there some kind of work around?
Hi, does winisd compute the port wolume with the box/chamber volume you input or do we have to offset the port volume from the actual box, thus adding more volume to the box to compensate?
Yes, you have to add volume to compensate. WinISD gives you the NET airspace. After you account for bracing, the drivers, and the port you end up with gross airspace.
I've never used WINISD before but it looks great. I use BBP6 but it feels limited most of the time. Instead of all those folds why not run the port up the back wall?
I don't know that WinISD is any better than Facebook pro. As far as folding the port versus running it up the back wall, that just depends on your other design restrictions. Maybe the back wall is not going to be long enough, maybe you have a depth issue.
@@DIYAudioGuy Just discovered your channel (been under a large bolder...) Your content is great and truly appreciated! Question on folding slotted ports, is there a rule to how many "folds"?
Hi @DIY Audio Guy Please can you assist me, I'm trying plug in a earthquake dbxi 15d 4 ohm sub into winisd but the manual I got don't have enough information especially for the electro-mechanical parameters and I keep hitting red . Any tips that could help me please. Much appreciated 🙏.
Please HELP anyone! I've built myself a sealed subwoofer that has an internal volume of 20 liters (2.5 cm thick, 32 cm wide, 30cm tall and 36 cm length, all external measurements). I've used the Ground Zero GZIW 200 driver (8") , and for this driver the manufacturer actually recommends a 17 liter vented enclosure with 1 single port ( 7cm , 2.76" wide, 24cm, 9.45" long). It being sealed sounds great, especially since it's in use in a quite small room, thucked under my desk , but i'm curious about converting this box to a ported one and thus increase the output. I've been playing in WinISD, tried to figure out what tune frequency i'd want (listening mostly to music) so i "decided" on a 30 hz, but i don't get it based on that ISD reports back, just what specs should this port have. I chose a round shaped port which i'm going to 3d print, but for a 10.2 cm port (which i'd find right considering the size of the box), it said 128.36 cm long, that's 3 times the length of the actual box. Also, 1st port resonance is 133, 88, is that good, bad, unknown? Could i also make multiple ports in order to cut down on the required length? What do i do? Thanks, i love subwoofers and audio generally speaking, and i'm also into DIY wherever i can, but getting the basics here doesn't seem that straight forward unfortunately.. :(
Do i need a high pass at ~25 hz before my subwoofer? Is it ok if my amplifier simply has a Infrafilter included and then those frequency wont even come to the subwoofer? Also does it make sense to filter those frequencies before they come into the amplifier in the first place? At the moment my diy subwoofer doesnt have that filter but my amp does, im wondering if i should be worried.
If your amp has an infrasonic filter (some call it a subsonic filter,it is just a high pass that keeps the lowest frequencies out of your sub) then you don't need any other infrasonic filter. I prefer to use the crossovers in my DSP because it is easier to adjust.
@@DIYAudioGuy Thanks for the respond! Then i just keep plain cable between my amp and my subwoofer. (quite a big system though, 2x 18'' RCF speakers on rated ~800 RMS Watts.)
thank you, please I have a 30w, 8ohm speaker. that's the only 2 data I read on the emant. how I can calculate the air of my box (speaker) to be made using winISD?
You'll need to find a way to measure the TS parameters, the date and audio dats is the way to go. You can pick one up from parts express. If you use my discount code diy5 they will cut you a little price break. Without that information you are just guessing. May as well just throw it in a half cubic foot box to into about 40 hertz.
The box volume in winisd tells the net internal volume (gross volume minus the woofer displacement, port displacement and any space occupied by bracing) or does it tell the gross volume ?
Does the folded port (that you have shown 10:15) have so-called "organ pipe" resonance? And what determines a frequency of such resonance, entire length of the port or lengths of it's sections?
All ports have that issue -- it is usually not something to worry about with a subwoofer. If you were designing a bookshelf speaker it would matter a lot more.
@@DIYAudioGuy Thank you. In my case it matters becase I am planning to run woofers up to 200-225 Hz. But even minimal size port gets an least 21" long.
@@DIYAudioGuy I was gettin worried for a minute. I entered 80% of peak it was far past X-Max around 57hz. At 80% RMS its right at X-max, which is 7mm for my sub. Thanks!
If you ever need a coupon for Parts Express I have some over on my blog: www.diysubwoofer.net
Great info
Link doesnt Work for me, is it because i am from Denmark? it said time out....not a PC nerd 🤓
how can I get in contact with you..?
@@palledrengens I don't think it's you because it doesn't work for me either and I'm in Indiana.
Do you have another coupon link? This one doesn't appear to be working anymore.
For Mac Users (this may have been said already) I finally found a way to run WinISD. Wine and WinBottler are free programs that have been recommenced to run WinISD without the hassle of virtual machines, bootcamp, parallels, etc. But for me, both of those program wouldn't run properly but simply not opening, or quitting/crashing when trying to load WinISD under advance options, respectively. Nearly giving up, I found Wine-Stable (Wine-Stable 7 the most recent version, but Wine-Stable 5 is what worked for me. I could be wrong, but during install I selected both 32 bit and 64 bit as an option. After installing Wine-Stable 5, I am finally able to run WinISD on my Macbook Pro, without having to pay for a windows subscription. I hope this helps anyone with a Mac!
Awesome!
Your content is so indredibly helpful to DIY beginners. I'm binging your stuff at 2 a.m. taking notes.
Glad to help!
4 AM here
Another 4am nigh owl here haha
I have started modding my speakers, now I want to build my own enclosures. I Love boxes that really let the LFE pump out.
I've been using winisd for quite some time. And I know all the points you said. But still I love to watch this video often 😂😂😂😂😂 ur explanation is energetic and engaging !!!! Great job !!! 👍👍👍
Glad you enjoyed!
You provided me so much information thank you. I have a prefab tswx300a and i added an external port with pvc pipe😂 i know its a frankenstein build but i can hit lower frequency now its a new box tuned to 28hz ( yes its a long port ). I never took the time to thank you for all your amazing work and your knowledge sharing . Salute from Paris. I might start upload my bass head journey😅
Glad to know that you are also a Windows User like mine ❤❤❤
From what I can tell this software is not available for a Mac.
Using this to design a box for 2 epique 7" dvc woofers for my room right now!
Your subsonic filter can greatly reduce air velocity which allows the use of a smaller port. I set my subsonic filter at the subs f3, but some also recommend setting at 2-3Hz below tuning, or one half octave below tuning.
That's a good point. I've got a video on setting an account infrasonic filter, I never thought about the impact the filter would have on port noise. But if you're cutting the signal you're going to be cutting the port noise as well. th-cam.com/video/iWRoIho7A7c/w-d-xo.html
A few hz below tuning is still cutting audible frequencies , a ported enclosure still plays below tuning , my box is tuned at 33hz but I still get audible notes at 28hz no way I would cut it at 32 or 31hz......imhave mine set at about 20-22hz that's much more reasonable
@7 Logik Well it also depends on the slope (6db, 12db, 24db, etc.) applied power, type of subs, enclosure size, and type of music you're playing (Rock, Hip Hop, Rebassed, etc.). The crossover filter doesn't just abruptly cut off frequencies, but it rolls them off at a given rate depending on the slope. So with a 33Hz tuning if the filter was set at 30Hz with a 12dB slope you would still be able to play 28Hz with no problem. The lowest recommended is 1/2 octave below tuning which would be 24.75Hz at 33Hz tuned.
@@fd1596 correct
Loving your video's, 3rd one in a row. Great work! WinISD is something I'm still learning myself, people like you and some others have been cool enough to break it down a little more for me. Appreciated!
Glad to help!
Hahaha... Im literally struggling with this since 2 days now, and here is Your video. :D
I hope the video helped!
LoudSpeakerDatabase is also a fantastic source for T/S Parameters (as it already has pre-populated files!), but it's user contributed so there's a bit of lag between new drivers and files being available.
I will have to check that out!
@@DIYAudioGuy It's great for people like me who always mess up the "order on entering the specs" or who struggle to find specs for certain drivers. It's sooo helpful when it's already there and all I have to do is click the "WinISD" link and download the file.
I look forward to hearing your thoughts on it.
Thank You so much for telling I spent 30 min entering the parameters it worked in the end but I'll still use LSD. Should have read this comment before doing lol
Hmm I tried using the LoudSpeakerDatabase driver and WINISD shows the red sign so it won't work in my case
@@ashyouknow7420 Ahh, that sucks. I wonder what parameter didn't pass integrity checks.
I'm so glad I found your channel. How did I not know about it sooner? Lots of technical stuff which I love. One question I have or would like to see a demonstration of is dampening or dampening factor. How ohm load effects it and spl/SQ and such.
I am not an expert on amplifiers, but from what I gathere damping factor is a way to express how well an amplifier controls the cone movement. It's one of those things that's important up to a point. Like everything else with audio there are diminishing returns.
@@DIYAudioGuy appreciate the reply. Its one of those im not even sure if or how they can measure it. Strage thing I've noticed when playing with the meter is that seems good damping seems more efficient with spl. Ya you can gain a db going to half ohm or whatever. But at the cost of 2x the amperage draw and sloppy cone control. but also not the case always.
@@sittdogg there's a device called an audio precision, the big manufacturers should all have access to one.
I always try to express the importance of high damping factor when playing low frequencies it’s basically the amplifiers ability to control the incoming eddy currents
Well explained. i had this sofware and deleted it now i going to re install i been searching months for info like this i learned everything in this video thanks my speaker is new on the market so i had a very hard time getting the correct box
Glad you enjoyed it!
Thanks for your videos! Using WINISD I learned that my particular subwoofer will play louder in all low bass frequencies in a smaller(1cu ft) sealed enclosure than in a 1.5cu ft. ported one. The TS of my sub indicated that it leans more towards a sealed sub than ported so this makes sense. The math doesn't lie as long as all the subwoofer information is properly filled in! Also I had port velocities up to 30m/s at tuning with the ported which isn't terrible but definitely not optimal. I just wish I could share my graphs.
That's the cool part about modeling enclosures with software, takes a lot of the guess work out of it.
hmm that's weird what subwoofer is it?
Interesting, I designed a 3 GHz RF cavity with tuning ports called re entrant cavities back in the 1990s. I used it for an electron positron accelerator at SLAC while I was at Stanford back in the day. I used it to smash sub atomic particles while you smash air molecules!
Science is fun.
I appreciate all the content you put out for us. (yes I know this was put up long ago) You make inputting the Thiele Small parameters look so easy. I'm not sure if I'm doing something wrong or if I don't have all the necessary info. After several attempts I'm still getting the dreaded red bar when trying to load the sub. Looks like its back to old school paper and pencil work for me.
When you enter the parameters pause for a second, click into a different field, and it will auto-calculate.
@@DIYAudioGuy thank you. I’ll give that another try when I get home.
I had the same issue with the latest version on widows 10. I ended up installing the older Alpha Pro 5.0 version. Rarely have issues other than manufacturers listing conflicting values in which case I only enter the bare minimum. I actually like the older version GUI better.
Winisd is great WHEN you can get the parameters correct in the correct order! That is always the frustrating part for me.Or when all the data is entered and winisd says it's wrong.But when it works, it is awesome!!
I find that often times it works even if the driver parameters aren't right.
@@DIYAudioGuy Maybe I have a real old version. It flat out will not let me continue when its is not all 100% correct.Ill delete and re-install and try that. Really is a insane FREE program!
@@jondoe6618
I think there is an article on Home Theater Shack that tells you how (in terms of the order) that you enter the parameters in order to get it to work. Tried everything but this article worked for me Finally.
@@drrckhamilton I watch toids diy audio video on how he does it. That has been the only way I have done it successfully.
I need help with a slot ported box sub up port back in a 2003 chevy tahoe for two 15s
I dig your channel, I'm glad I subbed. Have you ever made a video on how to build a box with bass radiators ?
I am glad you subbed! One of my first builds was a PR, I have been tinkering with them off an on. Here is an experiment that I tried: th-cam.com/video/6AShG7ozRsI/w-d-xo.html
It failed because the PR's came unglued.
THis was version 2.0, it was MUCH better. Ended up being tuned to 22HZ. That little 10 was killing those lows.
th-cam.com/video/WWNQZzwcbBM/w-d-xo.html
@@DIYAudioGuy Thanks I'm going to watch it now
Note on T/S parameters that I believe you have covered in another video but did not mention here; the mighty DATS! I love mine and for folks who play around with older or oddball subs the DATS is great for getting a set of T/S parameters to base your build on. Thanks for the great video!
DATS is a great tool!
You can build your own DATS for $30
Awesomely informational. Thank you for all the great videos.
Thanks for watching!
Hello @DIYAudiGuy, start off by saying I love and enjoy your videos! I have learned a lot by watching you and has taken my box designing to the next level. Made me feel so comfortable, I started taking on building for people. Question, I have a guy that has Nemesis Audio na12e v.3 subs, and I cannot find all parameters to get a green flag from WINISD. Is there a video on this, or a way around it? Any help would be much appreciated.
It can def be a challenge. I had the older version on my other laptop. Downloaded this version n I believe it to be a little less complicated than the older version
Useful for higher end subwoofers as the lower end manufacturers dont give you any soec details such as this.
Yes, true
Really appreciate the information on this subject and more.I have learned a lot from your videos and cleared up all the noise from friends sending me in every direction except the correct one.Math doesn't lie. Thanks
Glad to help! Maybe share some videos with those friends that need some guidance?
How’s the Bass Van going?
🤣
Very useful video for the new version. Thank you.
You are welcome!
Plz make video on curve dual bass .how set the angle of speaker.wich things we have to notice for this
You’re amazing! Enjoyable to watch and very helpful!
Glad to help!
After my $3000 JL e-110 failed, I`m looking at alternatives, I still have a good driver and enclosure, this may be one way I can fix the lack of bass in my system.
I hope it works!
Great video!
When entering the watts, do I use 80% of RMS? When I enter 75% of RMS my cone excursion is within limits but outside the limits at 80% of RMS. I am thinking I should be fine but what say you?
So you even go below resonance frequency to tune box low? Is that efficient?
When you tune it lower the peak SPL will go down. There is a trade-off between efficiency and low frequency extension for a new given box size.th-cam.com/video/A9oVxddE2GA/w-d-xo.html
WinISD accepted Hifonics Zeus ZXS-15D2 Xmax 26mm peak, but not 14mm linear Xmax. When i did use xlim 26mm and xmax 14 then the integrity check was all good. Its like math classes i hated :D
I use the .44 version it doesn’t argue parameters
That is correct.
Does it matter where we put the vent on the box? That is, a foot above the bottom in the middle of the back panel? A few inches from the bottom?
Thanks. Great videos.
It should not matter
@@DIYAudioGuy thanks man. So basically programs like WINisd have made it so almost anyone can make a great sounding vented box?
The most Important things to look at are port velocity, driver excursion and to have a smooth response?
Thanks again
Is the box size gross or net?
Thank you so much! Your content is super great. I'm having a problem getting "green" with my entry level subs (massive audio TKO 124) Do you offer plans for boxes? If so, how can I get you my info so we can move forward?
I have a pair of them sitting beside me. Hope to have a box plan and video out by the end of the month.
Looks like a cool program! Never tried it but I'm gonna have to get a computer so I can use something like this for designing speakers! (Only internet access I have rn is my phone which I'm writing this comment on.)
The good news is that it's a very old program so you don't need a new or fast computer. As long as you're running Windows it'll work. Avoid things like Chromebooks.
Ah yes... WinISD... the place I spend too much time in...
You and me both!!!
If you would, could you make a video explaining the differences between the older versions of winisd vs the new one (one youre using). I have only ever run an older version (0.44) and it is a completely different than the new one you just showed. Part of the reason being that the new one's auto fill for the T/S parameters screws up sometimes. Manufacturer will have one spec one way and winisd will say its wrong. Other than that I didnt know the new version has an excursion chart which I desperately wanted after using Hornresp (also another program you should touch on).
I need to give Hornresp a try for sure!
Love your videos! So easy to digest the information. Do you still help Patreon members with box designs? Looking for a second opinion on a design I received. Thanks!
Yep.
I have a quick question I'm hoping you can help with. When adjusting my port size as a sphere, it won't let me adjust the length, just the diameter. The length is in gray and won't let me click it. If I change to a vent, I can adjust both sizes with no issue. Any ideas would be much appreciated.
Great work. Out of curiosity how much do you charge to design boxes please
bit.ly/3IwIJLb
What could be the problem with the failed integrity check? I have entered all the ts parameters but it still fails! Awesome video as always!
It could be anything, it could be down to a rounding error or the parameters provided to you by the manufacturer might be wrong. When I enter my parameters I'm always very careful to make sure that the software has an opportunity to auto-calculate. Take the QTS, QMS and QES. WINisd Will let you enter in all three, I enter two of them, and then click in some other random field and the software will update. But if I enter the first two and then click on the third one and type it in then the software will not auto calculate. Hope that helps.
@@DIYAudioGuy all (the 10 or so I randomly picked) of the pre loaded drivers fail integrity check. Seems sketchy
@@mickharr That's odd
@@DIYAudioGuy yeah I thought so too. It seems the integrity check has no tolerance on the computed parameters, if you enter too many it will fail due to rounding.
Is the rear port the same as a front port? Because for me the winisd Works only for the rear but i want a front or from the Side. So can i use the same measurements?
My win ISD says all the drivers fail even the pre-saved ones that came with the application.
when i went into the cone excursion the green line was at 0mm peak the whole way is that a good thing or not?
For the life of me I cannot enter the T/S parameters of a Sundown Zv6 12" without receiving an integrity check error within Winisd. I've allowed it to auto calculate as well as followed the help guide provided within Winisd with no success. The SD parameter is absent from the sundown site, I'm not sure if that is contributing to integrity failure. Any suggestions would be greatly appreciated!
hello good night, great video. I would like to know if the calculation that winisd makes of the box, if the space that the speaker and the duct occupies is already included. Thanks
Nope, WINISD is going to give you the net airspace not the gross. So you have to add back in the port, any bracing, and the speaker itself.
Are their any books on speaker building that you can recommend.
good day . I am writing you from turkey. What do you think the bandpass box dimensions for alpine swr12d4 should be? Thank you from now
why is there no option for a series tuned quasi 6th! man ive been trying to find a program to model this box for days now
Hello! Query, the liters of the box that the software indicates in Item "BOX" are net internal liters or do we have to discount reinforcements, displacements of the sub, port, etc?
Greetings! Thank you very much for the video
Net internal. You will need to account for all of those things.
Aaaand, you've got a new subscriber.
When you say flare the port end, do you mean just simply rounding off the port ends with sandpaper or router bit, or are you talking about using aero ports?
I was specifically referring to arero ports. But I have found that rounding off the port with a router bit is very effective at cutting down port noise.
Please yes video on ts
Hey DIY Audio Guy, I need help! A buddy of mine works at Kipsch and he gave me a beefy 15" prototype. He didn't have the parameters on hand, but I have the DATs v3 so I wasn't that concerned. I entered everything in WinISD, no issues, but is there an ideal frequency that you tune a home theater box to? WinISD popped out a tuning frequency of 18 hrtz in a box size of 5.3 cbft. That seems awfully low to tune a box to. I've done this with a few other subs, but they were each tuned to 24 and 25 hrtz, but most videos I've watched on port tuning, and WinISD, most people seem to be setting their frequency in the 30's. I was wondering if you had any advice on what you would tune a 15" to. I understand it depends on the bass curve and all that, but you surely have an opinion on what you'd tune your home theater subwoofers to. Ok, don't hold back, hit me with both barrels,...lol.
For home theater, I like to tune the enclosure as flat as possible with as much low end extension as I can get while still keeping it flat. That typically means a very low tuning frequency and a very big box.
I have another possibly silly question. If the auto fill parameter in blue is drastically different than what the manufacturer posts, do you change it or leave it with the auto filled calculation?
Leave it, but double check everything to make sure you've got the units correct. Some of them are metric. Some of them are not.
@@DIYAudioGuy Awesome will do. Thanks again.
Was wondering the same thing
Hello for me my driver failed the integrety test, but also all the drivers that are already loaded in the program, what can i do? I have a Beyma 12LX60V2 driver...
Been looking for this video 📹 thank you 😊
Glad it was useful!
since 2003.. exelent small software, recommended.
yep, good stuff
Hello im struggeling to get the right slot port dimentions for my beyma 12LX60V2 do you have any suggestions to calculate this(not winISD)... Thanks...
great video .......i was looking at the crescendo forte 15 or 18 inch subwoofer....could these be tuned to 20 or 25 hz ...?..i would like to use them in hometheater.....thanks
I'm not familiar with those drivers. Other than just sticking the parameters in WinISD there's no real way to know.
I designed a box to 25Hz but to get the port noise down I selected the option to use 2 ports. Winisd says the ports need to be 69cm long, does this mean I need 2x 69cm long ports or is it 2x35cm ports? The length of the port doesnt change in Winisd based on the number of ports used so I dont know if I need the total length of all the ports combined to be what Winisd recommends or if they all need to be the full 69cm length.
I tried to follow along with an Alpine SWS-12D2 but the volume never gets auto populated and no response graph shows up. :( I am sure it is because I can't find all the fields required. Ah, if I edit the driver in the project and set Vas it graphs for me, not sure why it doesn;t bring the Vas from the driver I created.
This seems much more difficult to use than bassbox pro granted I have never used bassbox pro for much so IDK if they are similar in functionaliity.
Do you sell custom box plans?
I feel like you should have put a little more time into the part where you enter the parameters. I really recommend Toids video on that matter. Inputting data is very frustrating if you don't know in which order you have to plug in the values.
In my experience the order does not seem to really matter. You just have to go slow and make sure that the software is doing the auto calculations.
@@DIYAudioGuy Oh yea totally sorry I didn't mean the order. I meant that it is easiest if you go by a certain scheme. The scheme toid showed always yielded a good result for me
@@DIYAudioGuy In _my_ experience, having the software do the auto calculations is exactly what causes issues. Small "workaround" tricks that I've learned: 1.) Entering values in any other tab than the "Parameters" section can trigger an error, so while less "information about the naming of the speaker" will be available, keeping that info out allows for less erroring. 2.) After every value put in, regardless of the order in which you enter them, attempt to "Save" the project (you don't actually _have to_ save, just click the button to see if an error comes up that'd prevent you from being able to save). Then, backing out of the save and entering in your next value... This procedure can show you exactly when, where, and how the program doesn't like something you've done, and you can start to get a feel for what _not_ to do in the future to avoid errors from happening, like enabling "auto calculate".
What if i can't find the large-signal parameters for my sub
I’m new to the winisd, watched your video and went trough the sssteps needed to create the profile and box design . Now how do I get that to paper. I’m a construction worker so I know how to build the box itself but how do I apply the program to paper ? Please help .
Convert to cuin by multiplying by 1728 (say 2 cuft * 1728 = 3456 cuin). Then pick to dimensions (ie. 12" tall and 24" wide) Multiply those together (288). Then divide (3456/288) to get the depth (12). Hope that helps.
How many decimal places does the unit conversion need? I cannot get the checksum to pass no matter what I do. Had the same problem last time I tried WinISD years and years ago, and it seems it's still an issue. Incredibly frustrating; everyone always talks about how useful and powerful the program is, and I'd love to not have to do everything with pencil and paper like I have for the last 30 years... :(
That's not fun! I would just avoid doing unit conversions and change the units in winisd to match the ones given by the manufacturer.
Hi ... Please make a video on adding room gain and parametric EQ filters in winisd. Both for sealed and ported simulations. And even after adding filters cone excurtion should be in limits.
Not a bad idea!
@@DIYAudioGuy in some cases I saw that just after adding room gain filter, cone excurtion went up crazy 😂😂 !!!!
I dont think that happens in real world. I mean, cone excurtion may not behave completely different when the sub is in an open space Vs closed room.
Or winisd is estimating wrong. Need to investigate further...
dear audioguy,
can u do a correlation video regarding
vented boxes: correlation between transmissionline;bassreflex;horn
cuz port length does in fact matter due to the resonace fq
but in a non linear but expo port
aka horn how do i calculate that
eg. big W bin is combo port with horn
I don't really know enough about horns and transmission lines to do that.
I like your video, i wanted to build a boombox, but i don't have any information about the subwoofer. Is only 3 inch subwoofer.
With a driver that small just put it in a small enclosure and hope for the best.
Hey I've got a question about winisd.
I've been designing and comparing boxes for my next trunk build and I'm a bit confused.
Does/can winisd account for port placement?
There's a big difference in port+subs facing forwards compared to only one or the other facing forwards when squeezing two 15s into a trunk.
As I understand it the air pressure/sound wave coming from your port will synchronize or become in phase with the pressure/wave coming from the front of your driver and give you a bass boost.
Is there a way to know or graph when these waves become In and out of phase?
Does this effect still take place when your port is not facing the same direction as your subs, would it change the frequency at which the waves become in phase?
WinISD assumes that you are in a very large room and it does not provide any information about port location. The box size is net, meaning it does not take into account port displacement.
Honestly i have a lot of trouble in this area. I really need a custom box but completely suck at getting the right size that fits. Also I've used mostly sealed enclosures since the 90s. The last few years im using ported an to me they are not producing the bass i was getting back then. Yet i hear these ported enclosures are supposed to offer up more bass. Definitely not from prefabs.
Not sure what to tell you.
Question: would the direction of the woofer make a big difference in a design such as the one seen at the end?
Nope
Have any suggestions for a port tuning for rock/metal? Or think sealed might be the best way to go?
The conventional wisdom is to tune a bit higher or go with the sealed enclosure if you like that kind of music. My personal preferences to tune for a flat frequency response and a low f3, that way it sounds good no matter what music you have to be playing at the moment. But that's just me.
@@DIYAudioGuy Right on! Iv'e got a rockford T216, and been scratching my head on where to even start. Your videos are helping point me in the right direction though!
When you are looking at the different volumes/tuning frequencies, how are you making that adjustment without typing a number into the boxes? Are you doing a mouse scroll or using arrow keys? Starting around 7:19
You can adjust the box volume by clicking on the picture of the box and moving them mouse, or put your cursor in the input boxes and then use the arrow keys.
@@DIYAudioGuy Awesome, that's a great tip to know!
Is woofer displacement and port displacement also included when determining box size ?
Winisd does not account for that.
seems to be working OK on linux using WINE.
That is good to know.
When you input your box measurements, do you use gross or net?
Net
@@DIYAudioGuyThanks so much
I tried working with this application. Everything went fine with plugging in the parameters. But then when I opened the project and went to modify the volume of the box, I got an error “invalid floating point operation. Press ok to continue and risk data corruption or cancel.” I clicked ok either way but the graph disappears and I can’t do nothing else on the application. I already tried updating my drivers, but to no avail. I’m running windows 11 pro i7… is there some special processor I need or???
What’s the difference between the rear and front air velocity?
Also what’s the x max for the audiopipe bdc4-12? It’s listed @17mm but also says 50mm pk pk. I entered 17mm in winisd.
Rear port is a standard ported box. Front port is for a 4th order bandpass. With a 6th order bandpass you will use both.
Go with 17mm
Unfortunately ti looks like WinISD doesn't take Le or semi-inductance into consideration, both of which will appreciably change the response at bass frequencies for today's long x-max, high-power car audio woofers, particularly if they don't have "shorting rings" in the motor. That's why I prefer to use Hornresp for design work. Hornresp is a bit more difficult to understand though - which is why I developed my BOXPLAN Excel workbooks - just choose the one that matches the box you'd like to build, and it chucks out the corresponding Hornresp parameters :-)
I have been meaning to give hornresp a try.
I have a pair of old school stroker 18ds. It turns red when I load the t/s parameters.I am not sure what I need to do to continue.
Thanks for your help
Other than just going through it kind of slowly and giving it a chance to auto calculate there's not much you can do. Fortunately it seems like the software can operate when the parameter integrity check fails.
My parameters keeps failing, even though I provide as much info as I can on the Phoenix Gold 212D2...
Is there any reason you don’t do a 1” slot instead of 2”? I’m seeing length cut in half when I do that. Messing around w winisd, the changes I make seem counter intuitive, or too good to be true for my application
As long as you keep an eye on the port velocity, that will be fine.
So, Im thinking of building a small Cube Box for a 6 1/2" Woofer with two matching Passive Radiators. Does WinISD have a calc for this or is there some kind of work around?
Yes, WinISD will do that.
@@DIYAudioGuy Did the DL anyway and found it. Thanks for your Reply.
Hi, does winisd compute the port wolume with the box/chamber volume you input or do we have to offset the port volume from the actual box, thus adding more volume to the box to compensate?
Yes, you have to add volume to compensate. WinISD gives you the NET airspace. After you account for bracing, the drivers, and the port you end up with gross airspace.
you may use Winisd on mac if you run windows in a Virtual Machine ...
Hey thanks!
I've never used WINISD before but it looks great. I use BBP6 but it feels limited most of the time. Instead of all those folds why not run the port up the back wall?
I don't know that WinISD is any better than Facebook pro. As far as folding the port versus running it up the back wall, that just depends on your other design restrictions. Maybe the back wall is not going to be long enough, maybe you have a depth issue.
@@DIYAudioGuy yeah obviously provided none of those are a factor... Just I prefer as few bends as possible.
@@DIYAudioGuy Just discovered your channel (been under a large bolder...) Your content is great and truly appreciated! Question on folding slotted ports, is there a rule to how many "folds"?
Hi @DIY Audio Guy
Please can you assist me, I'm trying plug in a earthquake dbxi 15d 4 ohm sub into winisd but the manual I got don't have enough information especially for the electro-mechanical parameters and I keep hitting red . Any tips that could help me please. Much appreciated 🙏.
Go slower, give the software a second to auto-calculate the unknowns.
Is this available for cell phones, or PC only?
PC only.
@DIYAudioGuy ok thank you
Please HELP anyone! I've built myself a sealed subwoofer that has an internal volume of 20 liters (2.5 cm thick, 32 cm wide, 30cm tall and 36 cm length, all external measurements).
I've used the Ground Zero GZIW 200 driver (8") , and for this driver the manufacturer actually recommends a 17 liter vented enclosure with 1 single port ( 7cm , 2.76" wide, 24cm, 9.45" long).
It being sealed sounds great, especially since it's in use in a quite small room, thucked under my desk , but i'm curious about converting this box to a ported one and thus increase the output.
I've been playing in WinISD, tried to figure out what tune frequency i'd want (listening mostly to music) so i "decided" on a 30 hz, but i don't get it based on that ISD reports back, just what specs should this port have.
I chose a round shaped port which i'm going to 3d print, but for a 10.2 cm port (which i'd find right considering the size of the box), it said 128.36 cm long, that's 3 times the length of the actual box. Also, 1st port resonance is 133, 88, is that good, bad, unknown? Could i also make multiple ports in order to cut down on the required length? What do i do?
Thanks, i love subwoofers and audio generally speaking, and i'm also into DIY wherever i can, but getting the basics here doesn't seem that straight forward unfortunately.. :(
Do i need a high pass at ~25 hz before my subwoofer? Is it ok if my amplifier simply has a Infrafilter included and then those frequency wont even come to the subwoofer? Also does it make sense to filter those frequencies before they come into the amplifier in the first place? At the moment my diy subwoofer doesnt have that filter but my amp does, im wondering if i should be worried.
If your amp has an infrasonic filter (some call it a subsonic filter,it is just a high pass that keeps the lowest frequencies out of your sub) then you don't need any other infrasonic filter. I prefer to use the crossovers in my DSP because it is easier to adjust.
@@DIYAudioGuy Thanks for the respond! Then i just keep plain cable between my amp and my subwoofer. (quite a big system though, 2x 18'' RCF speakers on rated ~800 RMS Watts.)
thank you, please I have a 30w, 8ohm speaker. that's the only 2 data I read on the emant. how I can calculate the air of my box (speaker) to be made using winISD?
You'll need to find a way to measure the TS parameters, the date and audio dats is the way to go. You can pick one up from parts express. If you use my discount code diy5 they will cut you a little price break.
Without that information you are just guessing. May as well just throw it in a half cubic foot box to into about 40 hertz.
You make great informative videos
I appreciate that!
The box volume in winisd tells the net internal volume (gross volume minus the woofer displacement, port displacement and any space occupied by bracing) or does it tell the gross volume ?
Net, so you will need to add airspace to account for all those things.
Does the folded port (that you have shown 10:15) have so-called "organ pipe" resonance? And what determines a frequency of such resonance, entire length of the port or lengths of it's sections?
All ports have that issue -- it is usually not something to worry about with a subwoofer. If you were designing a bookshelf speaker it would matter a lot more.
@@DIYAudioGuy Thank you. In my case it matters becase I am planning to run woofers up to 200-225 Hz. But even minimal size port gets an least 21" long.
So is System input power under the Signal tab gonna be the peak or RMS of our amp?
RMS, always use RMS. (th-cam.com/video/NuO9b1fYisY/w-d-xo.html)
I typically use 80% of RMS since you lose some power due to box rise and power factor.
@@DIYAudioGuy I was gettin worried for a minute. I entered 80% of peak it was far past X-Max around 57hz. At 80% RMS its right at X-max, which is 7mm for my sub. Thanks!