Ive always been an aero-port guy myself but , the results speak for themselves . These re little things most dont think about so i appreciate these tests. Well done.
The big downside to port tuning, is the loss of musicality. When you port tune, it's basically optimising a smallish portion of bandwidth overall- and then you end up trying to find songs with that sweet spot that doesn't muddy up , fall flat pr bottom out. It took me years of builds to try to dial in the "best of worlds" so i could enjoy all different types of music. If you listen to MUSIC, sealed is your best option. As for slot vs aero porting i think the attraction of aero is ease of design and build. Best option for slot is to kerf, and knowing what your optimum cabin resonance rests at
Another advantage of an aeroport is adjustable tuning frequency by easily lengthening or shortening the tube. Only ran slot port myself but I would like to try an aero!
i agree...all depends on what type of tone you want..when slotted gotta take apart and in the time i do that i could of built and aero..im real cheap on buying wood these days
Hey man, thanks! I am a old school Bass Head, but still always learning along the way! I subscribed out of genuine interest in the hobby. Lol, my 27 year old son has ALWAYS been the alpha in the mobile audio game😂 My old 1992 Punch 75 is still going strong today in his truck😂 I wish my old pull out Pioneer Stereo and disc changer was still conducive today. It would be installed 😂
One of the biggest things to test when doing comparisons of this nature is the difference between the impedance the amplifier sees between both port designs as this will change the amplifiers output power and give a unfair/different result
@@jeffhoman9227 Right, this is part of what the test is supposed to show. No point in running a test if you're going to try to compensate for things before you even run a test. (There's a point to be made about having a "control" in an experiment, but that's different. The purpose for this test was to show these kinds of differences.)
The last 2 builds I've done on my builds were 4th order slots and IMHO sounds much better. Even playing your video back on my current new car , the slot sounded better and I heard smoother sweeps. But it's possible I'm being biased lol. 👍🏽
Very nice looking enclosures My next one will be aero style. Same reasoning as the other comment, being adjustable Found some really nice enclosures out of Kentucky. Not many used plexiglass in the 80's, I did. Every time I see yours the memories start rolling. Excellent review ✌️thanks man
Thank you so much man I appreciate it. I think people watching sometimes forget the work that goes into doing this. Hard to make all the videos perfect when there’s always so much to do. 😁
I remember running this test back in 1998. Yes, I am that old. I compared a slot port, round plastic port, and a square wood port. all had ported to the same frequency with the same overall internal cubic space. By using an SPL meter, sound spectrum analyzer, and multiple individuals, it was found that the square port sounded the best and rated highest on the SPL meter. However, using 3/4 inch MDF was the best thickness to use. Long story, but think was what a pipe sounds like when you talk through it.
So sir can you please prefer what size should be for a 12 inches sub if i use square wood port i have pioneer 1212 d4 with a box built according to its preferred dimension on the box
@@wutupclegg6618 thanks for the tip on the aero port I'm going to try it although the slot is louder the port just makes the ground shake or maybe I'm just tripping
I always found that although an Aero port chuffed audibly when in your face, overall it ended up sounding more ballsy and better when listening from the Driver's or optimal position, with the sub in the rear (in a hatch or open environment). When inside a trunk in a box separate from the drivers compartment (not on a baffle), they are difficult to distinguish and end up taking on characteristics of a BP.
Good video. Just for the future maybe do a slow linear tone sweep so the meter can display each frequency with the correct SPL numbers, seems weird the slot port got louder on burp frequencies but roughly the same as Aero port with the sweep all at the same volume level. However i may have missed something you said.
This is a very good video, but I would have prefered to see both boxes identical as in ports on the same side and boxes in same location in the back for a "TRUE" side by side comparison. Box placement and port placement in a vehicle can effect the SPL numbers aswell.
If it does only a meter will tell you I tried every direction you can think of I like subwoofers firing straight up and port up facing back is to much pressure on the hatchback or the license plate in a sedan facing forward In a sedan is OK but you have to seal it off right now I'm running one neo 4.11 fi on a Taramps md 2ohm 8k I had to brace the roof bye the dome light because it was flexing hard and this is a kia soul I need to build another enclosure for my two fi hc 15s I'm going to face the subwoofers up and put the port facing back towards the bottom
Wow, I just installed two 2x4" areo ports in two different boxes (1ft³ each). And I was wondering this very question while doing it. Because the boxes are prefabed, and where sold as sloted, but where actually sealed. But I made them ported. 😂
Great video and a reference for the future. Nice that even with appreciable power applied, your phone didn't distort the sound and I guess they'll ALWAYS make some noise up close other than what's in the program. Since you've done the work, here's a new hard-on for everyone - Connect them 100% in parallel (!!!) and get the best of both, keeping the ports apart with a clever divider or rotate them. (*_*) PS---I spent EVEN more time admiring the boxes' designs than absorbing the information, lol.
@@DaneParksDoghouse1 i dont see how that would change my opinion. Ive seen them used by better builders than you and just think they look like shit. Personal preference.
I've been building subwoofer boxes for 40 years, and I say slot port for the win, there are many reasons why, but I don't wanna give away all my secrets! But you do need to round the slot port on both end also for the chuf.
Don’t know if anyone pointed this out yet but if your mic is on the passenger side the sub on the driver side is naturally gonna meter louder. I would try with both subs in the same position
One test that would make this fair is if both boxes had the port in the exact same place. Use one box at a time with the above tests and then the other.
Now I have a box that has a 4 inch aero port and a single 15 and it hits exactly like the two 12s did 26hz np good amount of pressure didnt expect it from a smaller box and less cone Area
I build a lot of boxes, and this was a great video !! I prefer Aero over slot, if you build your enclosure correctly you can even make your port adjustable on the fly. Something you can’t do with Vented. I also don’t like the “chuffing” from vented. Maybe I’m the only one that can hear it, but just not musically appealing. I’ve had some great vented boxes over the years, but just prefer aero. Subbed, great job on the boxes ….👌👏
I'm guessing by vented you mean the slot ported as slot or aero they're both vented enclosures and as for adjusting a slot ported box on the fly you just slide in a section of wood or dense foam to reduce the height of the slot to lower the Fs tuning as you've effectively made the port longer just like you might add a block of wood inside the enclosure to reduce the Vas and raise tuning for burping rather than booming, slot ported every time here and tune low to push the group delay out of harms way.
@@g7vqedave2 I am curious. I am familiar with building and tuning boxes. You mentioned tuning low enough to where group delay is minimum. I am curious as to where you personally feel that frequency is..... in your opinion.
@@drrckhamilton I'm talking about my elderly mk 1 JL 13W7 here but from memory the Fs of that speaker was 27 Hz so using Win ISD my best box, again from memory, was a 7 cu ft tuned just below the speakers Fs at about 23 Hz. This wasn't a massively loud box but compared to a box tuned to give large gain at the vehicles cabin gain frequency say between 40 and 50 Hz for burping in competition or impressing bystanders it would be many Dbs higher in the 20 to 30 Hz range ie. a street bass box. Group delay will always be present in a ported box, more so when the box is tuned for max gain, and gives the flabby response that sealed box fans avoid but tuning the ported box low and spreading that gain to produce a flat response at 20 Hz where most sealed boxes can only dream of output leaves a more modest delay in the 30 Hz area and proper rumble.
You can't compare the "air velocity" that way. Because the surface space of the aero port is smaller, the moving air is more focussed (contained in a tighter area). So whatever air it is moving will likely measure higher. The slot port is so large that the air that it moves is so much kore widely sldisbursed that it simply is not an apples to apples scomparison. For strictly measuring the quantity of air passing through the ports, you would have to use something to capture the total amount of air passing through. Like using heavy plastic shaped like the port that then came to a single/same shape (smaller really) at which loint you could measure the quantity and velocity of the air being moved. But that of course would change everything about your desired test.
Bro it occurred to me may be the placement of the boxes should be the same? I mea i get they are right nex to each other but i saw a video on which placement of about where the slot box was was louder it is possible it was only placement making it louder
I was always taught that sealed boxes had the most slam to ported. Then bandpass. Your slotted acts more sealed. You get lower frequency with aero ported but less slam.
The only way to get the aero to fit inside the box is to go too small. Or incorporate a 90° inside the box. Now, if you go exterior aero, you can go to a 6". If you go to a 15" sub and a 6" aero, you get a better ratio.
3db is a lot,, it's double the power, I should think the slot port is showing the amplifier the higher load resistance making the amplifier do more, also obviously the port itself has a effect, test the impedance sweep
Great video, and nice boxes. But, even if the aero is "supposedly" more efficient. Isn't almost 50% less opening a bitt to much? I mean, if the point was to compare "identical " boxes?
You can't do identical port areas with an arrow versus slot port. Airports typically use 50% less area because there are circle if you had the airport the exact square inches of the slotted port it would be way too big and tuned way off. He even said in the video that he dats both of them and they both came out at the same frequency so his calculations are correct.
@terryheidmann4961 he also showed us that the aero port had almost 3x the port velocity. Not necessarily a god thing. Yes, tuning was the same. I can tune a 8" just the same. Just lengthen it. Use a 2" port and you can stil get the same tuning, at maby 6x the port velocity.
I would like to see the same test with only one box in the car at the same time, I noticed that you never showed both subs to see how much the other sub moved from the pressure of the powered one canceling out certain frequencies.
Next can you please make a band pass box for the vxf and compare it to the vented please? I’m tore up between a normal box and a band pass box thanks man subscribing
How long overall was your aero port and what website do you use to figure out what you need to cut? I have a 4 inch pp aero port in the mail but its huge and i dont know exactly how much to cut for a 35hz tuning and a 2.7 net box for a single 15 on 800rms. Thank you.
Tell me the external box dimensions and the thickness of the wood. And I’ll let you know. Most of the box calculators are way off, so I don’t trust those. I just calculate myself. Give me the box info and I’ll let you know how to cut the PP.
@HiFiVector 22x16.75x15 the wood is 5/8 thick. Also is 35hz a good tune? It's a kicker comp r. I listen to rap and Spanish music with an audiocontrol epicenter. Thanks.
So this information is specifically for precision port brand 4 inch airport. Because the flared ends already have some specific port length in them. So for your box to 35hz cut the tube 2” long. And after you assemble the flares and couplers on both ends, this should make the total length of the Aeroport from end to end to 8 inches.
@HiFiVector oh 2 inches wow cause this thing is huge currently as it sits new its like over a foot long so I didn't know the middle tube will have to be cut to only 2 inches. Makes sense. Thank you for this info.
Take one out of the car during testing and switch them. Then compare the test. Tou will see your numbers change as the speakers on this video will counter them selves at certain frequency while ocuping the same space. I've been in this game to long
there's a visual difference to me. The aero appear to have a subtle sideways oscillation and I can't help but wonder if it's a reaction to its position in the cab. Could have been camera angle.....
If you are that close to frying your coils you should buy a better woofer while you can still sell the one you are currently using. That being said, if you have the ability to run a slow test signal sweep on your ported box, you can actually visually see where the port is tuned. It will be the frequency where your woofer moves the least and the port moves the most air. With a large port, sometimes it will almost make your woofer appear completely stopped with almost no excursion, but the port will be moving massive amounts of air. This is the freq where your woofer will suffer the most. Because this is also usually the freq where you get the most SPL, and it is also the freq you love because you can really crank those tunes up with that magic freq. This tuned freq is also where your impedance will be the lowest and put the most load on your amplifier and get it hot and get it to really crank out that one bass freq. All the while that voice coil is barley moving and barely getting any cool air pumped around it, and it is getting hot, then your woofer goes Poof! How do you get around that? What's the answer? Choose a smaller port, a smaller port will not control the woofer movement as much at the tuned freq and the woofer cone/voice coil can move up and down more and get the cool air moving around it to keep it cool. Make sure to round and smooth the smaller port ends to keep the chuf away. Yes you will decrease your ability to play that one magic bass freq, but your amplifier will love you for it, your voice coil will love you for it, and your box will have a better flatter response.
What you should do is swap the boxes to see which side the slot Port could have been louder because it was on the left side of the vehicle and if you have the meter on the right or the other way around
You might get different results if you put the aeroport box and the slot pox on the same side for example if your mic is on the passenger side floorboard the sub on the driver side might be loading different compared to the sub on the passenger side
I wonder why in the two testa it showed differently, I am a slot port guy just because I can nail the rune every time and get exactly what I want for port area but aero is easy to tune with
I like this but, unfortunately, there’s a fatal flaw with the test. The boxes weren’t in the same vehicle position and also not in the same position relative to the mic. This will cause differences. An apples to apples test would be testing both from the same location. Especially when the mic placement is static a different box placement will result in significantly different scores. I’d love to see a part 2 using a 6” precision port and the placement issue corrected.
I love to see testing like this. One thing that could make a difference is the box position. Sometimes a box to one side or another can make it louder or quieter in the same metering position. It could be a variable to further test. Also is this test to the subs limits?
But one of the points of the video is when using a round aero port you don't go same size. They are supposed to be more efficient so you need to reduce the volume of the Aero port by 35-50% ( depending on your opinion) compared to a slot port. If you made them the same then the Aero port would be actually larger because it is more efficient.
Ive always been an aero-port guy myself but , the results speak for themselves . These re little things most dont think about so i appreciate these tests. Well done.
I think the aero port is smaller so it has less SPL, bigger port wether it's round or square, should have more spl,
Aeroport would still win if it had a similar area to the slot port
The big downside to port tuning, is the loss of musicality. When you port tune, it's basically optimising a smallish portion of bandwidth overall- and then you end up trying to find songs with that sweet spot that doesn't muddy up , fall flat pr bottom out. It took me years of builds to try to dial in the "best of worlds" so i could enjoy all different types of music. If you listen to MUSIC, sealed is your best option. As for slot vs aero porting i think the attraction of aero is ease of design and build. Best option for slot is to kerf, and knowing what your optimum cabin resonance rests at
Another advantage of an aeroport is adjustable tuning frequency by easily lengthening or shortening the tube. Only ran slot port myself but I would like to try an aero!
Unless you have a hi res mic you can’t accurately tell frequency response. Why not make the area of the ports and the the lengths the same?
i agree...all depends on what type of tone you want..when slotted gotta take apart and in the time i do that i could of built and aero..im real cheap on buying wood these days
also with aero earier to put port on outside of the box
Hey man, thanks! I am a old school Bass Head, but still always learning along the way!
I subscribed out of genuine interest in the hobby. Lol, my 27 year old son has ALWAYS been the alpha in the mobile audio game😂
My old 1992 Punch 75 is still going strong today in his truck😂 I wish my old pull out Pioneer Stereo and disc changer was still conducive today. It would be installed 😂
One of the biggest things to test when doing comparisons of this nature is the difference between the impedance the amplifier sees between both port designs as this will change the amplifiers output power and give a unfair/different result
When comparing same box size and same tune It's not a unfair result...it's an inherited result due to the enclosure design.
@@jeffhoman9227 Right, this is part of what the test is supposed to show. No point in running a test if you're going to try to compensate for things before you even run a test. (There's a point to be made about having a "control" in an experiment, but that's different. The purpose for this test was to show these kinds of differences.)
Isn't the smart 3k rated for 3000rms between 1-4ohm?
Slot port all day. I've built hundreds of enclosures... Always preferred slots.
What can u do about port noise. I have a 2cu box built to spec but has a lot of port noise actually sounds like sh*t
More port area
Done right, both can be potent without chuffing 👍
A very informal and well put together video. Those enclosures are beautiful. Thank you sir. Liked and subbed.
Awesome, thank you so much!
Great video. I was actually wondering if there was any difference myself so thanks 👍🏼👍🏼
And great job on the rest of it, you'd actually did answer a couple of my questions. On which application is better for me
The last 2 builds I've done on my builds were 4th order slots and IMHO sounds much better. Even playing your video back on my current new car , the slot sounded better and I heard smoother sweeps. But it's possible I'm being biased lol. 👍🏽
Great video, and the boxes look awesome!!! This was some really good content. 👍
Thanks so much!!
Very nice looking enclosures
My next one will be aero style. Same reasoning as the other comment, being adjustable
Found some really nice enclosures out of Kentucky.
Not many used plexiglass in the 80's, I did. Every time I see yours the memories start rolling.
Excellent review ✌️thanks man
Thanks so much I appreciate it!
Where out of ky? I live in ky
@@bubbawubba2307 conceptenclosures Nicholasville Kentucky
Dude that's awesome! What nice boxes, great tests! Very Very cool
Thanks for watching
I been using pvc since 1999 lol
Dude your enclosures looks like you been designing and building as long as me! Very nice!
Thanks so much appreciate it!
informative and the presentation gives that good comparison.
Thank you!
Good video. I’m definitely interested to see the part 2
Great video bud, I appreciate you going thru the trouble of building 2 boxes for this, thats dedication. Skar sux btw… just messin. Thanks
Thank you so much man I appreciate it. I think people watching sometimes forget the work that goes into doing this. Hard to make all the videos perfect when there’s always so much to do. 😁
Great video!! Satisfied my curiosity
I remember running this test back in 1998. Yes, I am that old. I compared a slot port, round plastic port, and a square wood port. all had ported to the same frequency with the same overall internal cubic space. By using an SPL meter, sound spectrum analyzer, and multiple individuals, it was found that the square port sounded the best and rated highest on the SPL meter. However, using 3/4 inch MDF was the best thickness to use. Long story, but think was what a pipe sounds like when you talk through it.
That’s a good point about “ what a pipe sound like when you talk through it” I’m sure the plastic pipe resonances can be heard to some extent.
@HiFiVector you hear a hollow sound. You can help get rid of that sound by wrapping sound deadening material around the port.
So sir can you please prefer what size should be for a 12 inches sub if i use square wood port i have pioneer 1212 d4 with a box built according to its preferred dimension on the box
@@wutupclegg6618 thanks for the tip on the aero port I'm going to try it although the slot is louder the port just makes the ground shake or maybe I'm just tripping
@deelos2269 Not the aero port, I was talking about a square port. Noy sure why, but it sounded harder than a slotted port.
super cool comparison bro turned out cool 😊😊😊
Glad you liked it!!
Very cool comparison! Thx!
Thanks for watching!
I always found that although an Aero port chuffed audibly when in your face, overall it ended up sounding more ballsy and better when listening from the Driver's or optimal position, with the sub in the rear (in a hatch or open environment). When inside a trunk in a box separate from the drivers compartment (not on a baffle), they are difficult to distinguish and end up taking on characteristics of a BP.
I’ve always ran slot ports love the look of aeros though
Good video. Just for the future maybe do a slow linear tone sweep so the meter can display each frequency with the correct SPL numbers, seems weird the slot port got louder on burp frequencies but roughly the same as Aero port with the sweep all at the same volume level. However i may have missed something you said.
Thanks for the info. I helped my curiosity. Thanks for sharing.
"It helped" not "I helped". Lol!
Great comparison indeed
I don't know what is up but this TH-cam channel just had my headphones slamming harder than I have ever had
Do you mean the video levels were too loud?
This is a very good video, but I would have prefered to see both boxes identical as in ports on the same side and boxes in same location in the back for a "TRUE" side by side comparison. Box placement and port placement in a vehicle can effect the SPL numbers aswell.
If it does only a meter will tell you I tried every direction you can think of I like subwoofers firing straight up and port up facing back is to much pressure on the hatchback or the license plate in a sedan facing forward In a sedan is OK but you have to seal it off right now I'm running one neo 4.11 fi on a Taramps md 2ohm 8k I had to brace the roof bye the dome light because it was flexing hard and this is a kia soul I need to build another enclosure for my two fi hc 15s I'm going to face the subwoofers up and put the port facing back towards the bottom
Wow, I just installed two 2x4" areo ports in two different boxes (1ft³ each). And I was wondering this very question while doing it. Because the boxes are prefabed, and where sold as sloted, but where actually sealed. But I made them ported. 😂
Cool video thanks for sharing
Great video and a reference for the future. Nice that even with appreciable power applied, your phone didn't distort the sound and I guess they'll ALWAYS make some noise up close other than what's in the program. Since you've done the work, here's a new hard-on for everyone - Connect them 100% in parallel (!!!) and get the best of both, keeping the ports apart with a clever divider or rotate them. (*_*) PS---I spent EVEN more time admiring the boxes' designs than absorbing the information, lol.
Great test. I prefer Aero ports over slot ports though. I just like the way they look better.
And you can get creative with where you put the port.
And I think areoports look sloppy and amateur.
@@joshuarayne1676 that's your opinion, and that's cool.
Just goes to show that you haven't seen one of my aeroport boxes.
@@DaneParksDoghouse1 i dont see how that would change my opinion. Ive seen them used by better builders than you and just think they look like shit. Personal preference.
@@joshuarayne1676 We'll just have to agree to disagree.
@@DaneParksDoghouse1 I do not agree to your terms.
I've been building subwoofer boxes for 40 years, and I say slot port for the win, there are many reasons why, but I don't wanna give away all my secrets! But you do need to round the slot port on both end also for the chuf.
Don’t know if anyone pointed this out yet but if your mic is on the passenger side the sub on the driver side is naturally gonna meter louder. I would try with both subs in the same position
One test that would make this fair is if both boxes had the port in the exact same place.
Use one box at a time with the above tests and then the other.
Wow, you can make a beautiful box bro!👏👏👏
Thank you so much man appreciate that.
Now I have a box that has a 4 inch aero port and a single 15 and it hits exactly like the two 12s did 26hz np good amount of pressure didnt expect it from a smaller box and less cone Area
i did same type of setup to see the differences and i also found big difference between using mdf or pine ,etc pine resonated better
you actually do NOT want any resonance.
Hey what kind of stain did you use ? Looks great !
Awesome video bro !!!!!!!!
Appreciate it!!
nice box build
Thank you
What is the deminsions on those boxes? I got the same subs and I'm the process of building the boxes now just curious.
I've got both slot Port and aero Port boxes
I build a lot of boxes, and this was a great video !! I prefer Aero over slot, if you build your enclosure correctly you can even make your port adjustable on the fly. Something you can’t do with Vented. I also don’t like the “chuffing” from vented. Maybe I’m the only one that can hear it, but just not musically appealing. I’ve had some great vented boxes over the years, but just prefer aero. Subbed, great job on the boxes ….👌👏
Agreed. I like the smoothness of the bass the aero produces over the choppy slot port.
I'm guessing by vented you mean the slot ported as slot or aero they're both vented enclosures and as for adjusting a slot ported box on the fly you just slide in a section of wood or dense foam to reduce the height of the slot to lower the Fs tuning as you've effectively made the port longer just like you might add a block of wood inside the enclosure to reduce the Vas and raise tuning for burping rather than booming, slot ported every time here and tune low to push the group delay out of harms way.
@@g7vqedave2
I am curious. I am familiar with building and tuning boxes. You mentioned tuning low enough to where group delay is minimum. I am curious as to where you personally feel that frequency is..... in your opinion.
@@drrckhamilton I'm talking about my elderly mk 1 JL 13W7 here but from memory the Fs of that speaker was 27 Hz so using Win ISD my best box, again from memory, was a 7 cu ft tuned just below the speakers Fs at about 23 Hz.
This wasn't a massively loud box but compared to a box tuned to give large gain at the vehicles cabin gain frequency say between 40 and 50 Hz for burping in competition or impressing bystanders it would be many Dbs higher in the 20 to 30 Hz range ie. a street bass box.
Group delay will always be present in a ported box, more so when the box is tuned for max gain, and gives the flabby response that sealed box fans avoid but tuning the ported box low and spreading that gain to produce a flat response at 20 Hz where most sealed boxes can only dream of output leaves a more modest delay in the 30 Hz area and proper rumble.
7 cu 😮
This is a dope video. Tha ks for doing this
Thank you
*Thanks for the demo differences. This really helps a lot when I’m trying different subwoofers* 👌🏾
Happy to help!
Very beautiful enclosures. Look like they belong inside the house.
On music in my ride areo port\flare is king on lows 25hz to 40hz louder\forceful bass 4 door sedan
Great video🔉🔈🔊👍
What color and type of stain did u use?
You can't compare the "air velocity" that way. Because the surface space of the aero port is smaller, the moving air is more focussed (contained in a tighter area). So whatever air it is moving will likely measure higher.
The slot port is so large that the air that it moves is so much kore widely sldisbursed that it simply is not an apples to apples scomparison.
For strictly measuring the quantity of air passing through the ports, you would have to use something to capture the total amount of air passing through. Like using heavy plastic shaped like the port that then came to a single/same shape (smaller really) at which loint you could measure the quantity and velocity of the air being moved.
But that of course would change everything about your desired test.
Nice!
Slot port for sure.
(was judging from your 1st quick test)
I heard the difference of the gate.
I tend to like slot
Do you have full dimensions on your box. I like that design. I would like to build one for my 12 inch mesa. Buy the way. Great comparison.
How did you get that color? I want to paint my birch box but I don’t know how to even start. I want it to look just like those
your talent shows awesome 👍 👍
Bro it occurred to me may be the placement of the boxes should be the same? I mea i get they are right nex to each other but i saw a video on which placement of about where the slot box was was louder it is possible it was only placement making it louder
I was always taught that sealed boxes had the most slam to ported. Then bandpass. Your slotted acts more sealed. You get lower frequency with aero ported but less slam.
Slot port has been winning the bass comps in my city. 160.99 last run. Next best was 158.7
The aero port looks better to me, plus it's a lot easier to do! 😁
Thanks man ❤
Good testings
Thank you!
The only way to get the aero to fit inside the box is to go too small. Or incorporate a 90° inside the box. Now, if you go exterior aero, you can go to a 6". If you go to a 15" sub and a 6" aero, you get a better ratio.
What if you put more areo ports? like two insted of one.
How amps are you running on your alternator.
Question I have is what factors were made when you chose the vxf over the zvx
I have had both and in my opinion the vxf has way better sound quality.
This Cool Man Thanks
I like aeroports better, they sound better to me. A 6 inch aero might have been more closer in Port area
so doesnt matter. Just choose what you like or how easy you want the build to be I do want to try a tube though.
3db is a lot,, it's double the power, I should think the slot port is showing the amplifier the higher load resistance making the amplifier do more, also obviously the port itself has a effect, test the impedance sweep
Sure slot port boxes are loud, if you love the sound of port noise. The older I get, the more I like the sound quality over SPL.
Great video, and nice boxes.
But, even if the aero is "supposedly" more efficient. Isn't almost 50% less opening a bitt to much? I mean, if the point was to compare "identical " boxes?
Marketing hype and its victims...
Without identical port area this test is highly flawed.
You can't do identical port areas with an arrow versus slot port. Airports typically use 50% less area because there are circle if you had the airport the exact square inches of the slotted port it would be way too big and tuned way off. He even said in the video that he dats both of them and they both came out at the same frequency so his calculations are correct.
@terryheidmann4961 he also showed us that the aero port had almost 3x the port velocity. Not necessarily a god thing. Yes, tuning was the same. I can tune a 8" just the same. Just lengthen it. Use a 2" port and you can stil get the same tuning, at maby 6x the port velocity.
Love to see you do a video on the 15 American bass hawk sub. Some say its the best sub ab makes.
Noted!
American Bass woofers are awesome
What’s the specs for the slotted port box
what kind of wood did you use on these boxes and where did you get it?
Birch Home Depot
Can you test out MTX9500 12" and Orion HCCA 12"
Nice
I would like to see the same test with only one box in the car at the same time, I noticed that you never showed both subs to see how much the other sub moved from the pressure of the powered one canceling out certain frequencies.
How do I get a box like that?
hey mate, have you done 4th order band pass comparison?
No I haven’t
@@HiFiVector probably not worth it ,Just playing around with vent and 4th band on Winisd ,vent is loader and go lower
Beautiful boxes I need one of those boes for my avatar stu 12 please help
Next can you please make a band pass box for the vxf and compare it to the vented please? I’m tore up between a normal box and a band pass box thanks man subscribing
It is on my list but I have a long to do list! lol thank you man!
How long overall was your aero port and what website do you use to figure out what you need to cut? I have a 4 inch pp aero port in the mail but its huge and i dont know exactly how much to cut for a 35hz tuning and a 2.7 net box for a single 15 on 800rms. Thank you.
Tell me the external box dimensions and the thickness of the wood. And I’ll let you know. Most of the box calculators are way off, so I don’t trust those. I just calculate myself. Give me the box info and I’ll let you know how to cut the PP.
@HiFiVector 22x16.75x15 the wood is 5/8 thick. Also is 35hz a good tune? It's a kicker comp r. I listen to rap and Spanish music with an audiocontrol epicenter. Thanks.
So this information is specifically for precision port brand 4 inch airport. Because the flared ends already have some specific port length in them. So for your box to 35hz cut the tube 2” long. And after you assemble the flares and couplers on both ends, this should make the total length of the Aeroport from end to end to 8 inches.
Yes 35hz will be great for your situation.
@HiFiVector oh 2 inches wow cause this thing is huge currently as it sits new its like over a foot long so I didn't know the middle tube will have to be cut to only 2 inches. Makes sense. Thank you for this info.
I don't fully understand boxes yet. But I was running 2 12s in a custom box with a slotted port 5 inches wide by 12 inches in height
Do you make and sell enclosures like these?
I make my boxes but I don’t sell to public.
those boxes are beautiful... were the woofers broken in the same amount?
Yes same amount of time in them.
Which is better for deep bass and reverb?
Honestly both are good a lot of it is just how the box is built.
Take one out of the car during testing and switch them. Then compare the test. Tou will see your numbers change as the speakers on this video will counter them selves at certain frequency while ocuping the same space. I've been in this game to long
there's a visual difference to me.
The aero appear to have a subtle sideways oscillation and I can't help but wonder if it's a reaction to its position in the cab.
Could have been camera angle.....
Try the test with equal port volume. Also the slot port test was 1hz higher in each test
I did that in the “ part 2” video check it out.
Idk..But to me...They should be in the same spot to do a really good test..Like have both on driver side etc..But awesome job..But slot port for me...
You should do a thermal on the voice coil. Cause personally I want the one that keeps me from frying my coils
If you are that close to frying your coils you should buy a better woofer while you can still sell the one you are currently using. That being said, if you have the ability to run a slow test signal sweep on your ported box, you can actually visually see where the port is tuned. It will be the frequency where your woofer moves the least and the port moves the most air. With a large port, sometimes it will almost make your woofer appear completely stopped with almost no excursion, but the port will be moving massive amounts of air. This is the freq where your woofer will suffer the most. Because this is also usually the freq where you get the most SPL, and it is also the freq you love because you can really crank those tunes up with that magic freq. This tuned freq is also where your impedance will be the lowest and put the most load on your amplifier and get it hot and get it to really crank out that one bass freq. All the while that voice coil is barley moving and barely getting any cool air pumped around it, and it is getting hot, then your woofer goes Poof! How do you get around that? What's the answer? Choose a smaller port, a smaller port will not control the woofer movement as much at the tuned freq and the woofer cone/voice coil can move up and down more and get the cool air moving around it to keep it cool. Make sure to round and smooth the smaller port ends to keep the chuf away. Yes you will decrease your ability to play that one magic bass freq, but your amplifier will love you for it, your voice coil will love you for it, and your box will have a better flatter response.
Did u check the impedance difference in the 2 designs by chance ?
I did not
What you should do is swap the boxes to see which side the slot Port could have been louder because it was on the left side of the vehicle and if you have the meter on the right or the other way around
On the slot port calculate Air volume Then calculate the same air volume on aeroport.the Could be 6round 18long
You might get different results if you put the aeroport box and the slot pox on the same side for example if your mic is on the passenger side floorboard the sub on the driver side might be loading different compared to the sub on the passenger side
I did try that, and it didn’t change anything much so that’s why I didn’t switch when I did the video. Also SPL meter was center windshield.
What is the xmax on these subs they sure seem to be flexing
25mm one way
I wonder why in the two testa it showed differently, I am a slot port guy just because I can nail the rune every time and get exactly what I want for port area but aero is easy to tune with
I like this but, unfortunately, there’s a fatal flaw with the test. The boxes weren’t in the same vehicle position and also not in the same position relative to the mic. This will cause differences. An apples to apples test would be testing both from the same location. Especially when the mic placement is static a different box placement will result in significantly different scores. I’d love to see a part 2 using a 6” precision port and the placement issue corrected.
What app is that I'd like to meter mine
It’s the SSA. SPL meter it’s around $400.
I love to see testing like this. One thing that could make a difference is the box position. Sometimes a box to one side or another can make it louder or quieter in the same metering position. It could be a variable to further test. Also is this test to the subs limits?
Would be nice if the ports were the same size.
But one of the points of the video is when using a round aero port you don't go same size. They are supposed to be more efficient so you need to reduce the volume of the Aero port by 35-50% ( depending on your opinion) compared to a slot port. If you made them the same then the Aero port would be actually larger because it is more efficient.
Yea I understand. Great video 👍