Oh I’m that type of guy!! Test test test is key!! Measure ten times, cut once! Not measure once and then end up cutting ten times!! Cool upload man, your delivery is amazing!!
Dayton Audio has some really cool stuff. I have two of their bass transducers hidden in my couch. They add an incredible amount of depth and sound stage to my home theater.
I ordered a pair of Skar SDR-10 DVC 2 ohms thinking that they were going to run at 1 ohm at the amp. Come to find out they would have been at 0.5 ohms. Had to send them back to Skar. I ordered the right pair, SDR-10 DVC 4 ohms. Now, I believe they are at 1 ohm at the amp getting 1,200 watts from an Audiopipe APMI- 1500 amp.
@@DIYAudioGuy I actually ordered the subs through Amazon. I got impatient after the first email to Skar and returned them through Amazon instead of dealing with Skar. They pretty much told me I could have received the correct ones quicker had I dealt with them.
@@davidnievesjr.9478 Good! Not everybody has a DD-1 or an oscilloscope just laying around, but anyone who's doing stuff with a car audio needs to have a multimeter.
I love all the Kenwood amps you own. I own the KAC-m3004 myself like you have on your amp rack. Also a Kenwood Excelon 4 channel and mono amp. Excellent underrated amps!! I personally prefer Kenwood products over Pioneer
Because 4 ohms of impedance is NOT THE SAME as 4 ohms of resistance. The multimeter likely only measures resistance. Impedance is the measurement of resistance over a range of frequencies whereas resistance is measured at a single frequency or zero frequency. Huge difference!
How much impact does the port location have on loading in a multiple subwoofer enclosure? And is the created subwoofer loading impedance imbalance something to seriously consider? Thanks for your reply. -Cheers mate
Barevids mentioned that in one of his videos. It was the video where he showed how to phase match when you have two amps hooked up to two different drivers in the same box. I'm sure it has an impact, I don't know how big that impact is and I have no idea how to measure it.
@@hippo-potamus it was a very short comment he made, about one driver being closer to the port and it might make a difference in their output. One piece of box building advice that I've heard for years is that you're not supposed to have your port aimed right at the back of your speaker. If you can look through the port and see the magnet the port is in the wrong place. The back pressure that makes the system work never develops. If that rule of thumb is true then you are on to something.
Lesson learned decades back: I zzztpoofed a woofer. Replaced it. Noticed that the wires were puny. Replaced them. Fired up Credence. Damn - the other woofer blew out! Put my fingers on the other woofer. It's working. The original woofer was working much better because I put a foot of 14 gauge in the box, and - this is major - I had 14 gauge running from a high quality Sansui amp to the speakers. Put at least 14 gauge wires on the feed to your woofers. Look up damping factor to understand why.
Do not push on your speaker cone while you have your meter set to ohms. The impedance reading on the meter while you are pushing the cone up and down is not the impedance changing, but it's actually voltage that you are feeding into your meter and potentially going to blow fuses or the meter.
Hello brother! Im about to switch my system up and am going sealed. My question. Will i get less/more impedance rise with a sealed vs ported enclosure. I have two amplifiers to choose from. I googled but couldn't find any useful information. Thank you. Love your content!
That is perfectly normal. If you were to measure the individual coils before you wired them you would find that the coils don't read exactly 4 ohms. If you're worried you should reach out to sundown tech support and they can verify that you should be just fine.
I showed a plot from WINisd demonstrating how impedance changes as a function of frequency inside of an enclosure. This is what most people call box rise, some call it impedance rise. Both names are wrong because the impedance rises and falls, depending on the frequency.
@@DIYAudioGuy oh... Thank you for responding... I haven't done a "system" in a long time and heard the term "box rise" thinking that was box flex or something... Really enjoyed your video and have subscribed and looking forward to more uploads
Hey man, I got a DD 612 (600 watt rms) and plan to power it with a Rockford power 1500bdcp. Because this Rockford amp is very underrate (birth sheets shows 1200 watts at 4 ohm), would it be safe, to run it at 8 ohms? To get around rms rating of speaker??
@@Kevin-wy8kc If you wire the coils in parallel and connect to a mono amp you can run at 2 ohms and you should be able to send more power to the subwoofer.
Well that's the thing getting older and my Kicker 12 hurts my head now so I'm getting an 8 to replace it and my amp around 1000w @ 2ohms and the new 8 is an nvx 500w so I got it in 2 ohms to bring it up to 4 so I can get it in around at the 500w range did I do that right?
I like to think of the nominal impedance rating as a shortcut that you can use to make sure that you've matched your subwoofers to an inappropriate amplifier. Resistance of an inductor in an AC circuit will be a function of the frequency.
I have a skar evl 12 4ohm running on a kicker dx 1000.1 @2 ohms in a ported box Amp is rated at 1k at 2ohm and like 1250 at 1 ohm I’m thinking about changing my setup to a dual 10 box ported box at 1 ohm. Would this make any noticeable differences? I want windshield flex I also have a larger amp but tight on space So my options are single 12, dual 10 or dual 8
I don't know how much power/cone area needed to get your windshield to flex, it will often depend on the car. But I suspect you are going to need a lot more.
@@DIYAudioGuy so my last system did the trick, kicker zx2400.1 paired with an Orian hcca 12. 2400w at 1ohm. Still have amp but the woofer and box took to much space. I’m hoping 2 10s on that same amp would do better then a solo HCCA but who knows
I have a kicker l7 2 ohm dvc in the trunk and a box for two subs in the backseat. Ihave 2 svc 124ohm and 1 dvc 4 ohm. How do I get the maximum out of my 3000 w 1 ohm stable amp and i don't care if you don't recommend mixing impedances bc I'm ghetto af if u can't tell. I also have a Walmart 2500 that I ain't scared to run at 1 ohm even though it's rated for 2. i can't be the only person with mixed things i feel like im wasting by not using. Where do I go for information on this besides the hood bc the block is hot!? I decided to ask u out of vega, big d, or parker etc
You won't get an accurate reading with a subwoofer or speaker turned upside down cuz it's pushing in on the rubber surround and that causes the nerves to go for them like you seen well set it up straight like you did other ones and read it that's why that one was 1.9 on this too
It is VERY hard to not look at the flip-out screen. I have gotten a lot better at, but still not perfect. If I ever upgrade the camera I am going to try one with a flip-up screen. Hopefully looking up will be a bit less obvious.
Oh I’m that type of guy!! Test test test is key!! Measure ten times, cut once! Not measure once and then end up cutting ten times!! Cool upload man, your delivery is amazing!!
I've been tinkering with the lighting. I think I finally have it figured out.
Dayton Audio has some really cool stuff. I have two of their bass transducers hidden in my couch. They add an incredible amount of depth and sound stage to my home theater.
👍🏼 thumbs up one of best explanations of impedance grapth, I finally understand it!
It can get pretty complicated.
Awesome info Professor DIY👍also your gain setting video is always my go when setting up amps.
Thanks!
I ordered a pair of Skar SDR-10 DVC 2 ohms thinking that they were going to run at 1 ohm at the amp. Come to find out they would have been at 0.5 ohms. Had to send them back to Skar. I ordered the right pair, SDR-10 DVC 4 ohms. Now, I believe they are at 1 ohm at the amp getting 1,200 watts from an Audiopipe APMI- 1500 amp.
That sounds about right. How was the SKAR customer service? Any troubles swapping out woofers?
@@DIYAudioGuy I actually ordered the subs through Amazon. I got impatient after the first email to Skar and returned them through Amazon instead of dealing with Skar. They pretty much told me I could have received the correct ones quicker had I dealt with them.
@@DIYAudioGuy Btw, I watched your video on setting the gains with just a Multi-meter. That is very useful information. Thanks very much.
@@davidnievesjr.9478 Good! Not everybody has a DD-1 or an oscilloscope just laying around, but anyone who's doing stuff with a car audio needs to have a multimeter.
plugged many subs into the wall
It can be done safely, I would just hate for some idiot to try it and get hurt. Thanks for watching!
@@DIYAudioGuy I plugged my butter knife into a toaster element, 240volt 50hz here. I learnt never to do that again.
Shocking
6:31 i def see that mistake fixed 😂😂
The exciting thing looks like a audio transducer. Great video!
It is!
I love all the Kenwood amps you own. I own the KAC-m3004 myself like you have on your amp rack. Also a Kenwood Excelon 4 channel and mono amp. Excellent underrated amps!! I personally prefer Kenwood products over Pioneer
Kenwood makes good stuff.
Because 4 ohms of impedance is NOT THE SAME as 4 ohms of resistance. The multimeter likely only measures resistance. Impedance is the measurement of resistance over a range of frequencies whereas resistance is measured at a single frequency or zero frequency.
Huge difference!
Here is a great way to measure that: th-cam.com/video/6g39ScWma3U/w-d-xo.html
Few years ago ? I bought a multimeter in the 80s at radio shack
Age gets like that 😂 it all condenses like geological layers, brain stops growing age 25-26, after that its all downhill, fill your vessel wisely
How much impact does the port location have on loading in a multiple subwoofer enclosure? And is the created subwoofer loading impedance imbalance something to seriously consider? Thanks for your reply. -Cheers mate
Barevids mentioned that in one of his videos. It was the video where he showed how to phase match when you have two amps hooked up to two different drivers in the same box. I'm sure it has an impact, I don't know how big that impact is and I have no idea how to measure it.
Yea I saw that video where he divided the coils to each amp, guess I must of not been paying attention very well :)
@@hippo-potamus it was a very short comment he made, about one driver being closer to the port and it might make a difference in their output. One piece of box building advice that I've heard for years is that you're not supposed to have your port aimed right at the back of your speaker. If you can look through the port and see the magnet the port is in the wrong place. The back pressure that makes the system work never develops. If that rule of thumb is true then you are on to something.
Lesson learned decades back: I zzztpoofed a woofer. Replaced it. Noticed that the wires were puny. Replaced them. Fired up Credence. Damn - the other woofer blew out!
Put my fingers on the other woofer. It's working. The original woofer was working much better because I put a foot of 14 gauge in the box, and - this is major - I had 14 gauge running from a high quality Sansui amp to the speakers.
Put at least 14 gauge wires on the feed to your woofers. Look up damping factor to understand why.
Do not push on your speaker cone while you have your meter set to ohms. The impedance reading on the meter while you are pushing the cone up and down is not the impedance changing, but it's actually voltage that you are feeding into your meter and potentially going to blow fuses or the meter.
Steve Meade has a video connecting a huge ass sub connected to 120v.
It’s called woofer vs wall socket! 😮
Hello brother! Im about to switch my system up and am going sealed. My question. Will i get less/more impedance rise with a sealed vs ported enclosure. I have two amplifiers to choose from. I googled but couldn't find any useful information. Thank you. Love your content!
That is a good question. I have never looked into it.
@@DIYAudioGuy when I find out I'll be sure to let you know brother
2:35 steve meade: challenge accepted
He has an old video where he did that with those big Fi's he was using in his build. They took the power no problem.
@@DIYAudioGuy I know, he also did one recently where he hooked one of his own woofer's into 240v power ☠️
What are your thoughts on the Dayton Audio DCS255 10 Inch Subwoofer?
I'm using one of their 12-in models in my home theater. They are great drivers, and they used to be a great value back before inflation kicked in.
I wired 2 dual 4ohm subs to 1ohm, I’m getting a reading of .9ohms. I’m going to run it on a sundown sfb 8k the amp isn’t stable under 1ohm. Is it ok?
That is perfectly normal. If you were to measure the individual coils before you wired them you would find that the coils don't read exactly 4 ohms. If you're worried you should reach out to sundown tech support and they can verify that you should be just fine.
@@DIYAudioGuy thank you for the reply, much appreciated.
Did I miss the discussion on "box rise"?
I showed a plot from WINisd demonstrating how impedance changes as a function of frequency inside of an enclosure. This is what most people call box rise, some call it impedance rise. Both names are wrong because the impedance rises and falls, depending on the frequency.
@@DIYAudioGuy oh... Thank you for responding... I haven't done a "system" in a long time and heard the term "box rise" thinking that was box flex or something... Really enjoyed your video and have subscribed and looking forward to more uploads
@@joesch11 👍
Hey man, I got a DD 612 (600 watt rms) and plan to power it with a Rockford power 1500bdcp. Because this Rockford amp is very underrate (birth sheets shows 1200 watts at 4 ohm), would it be safe, to run it at 8 ohms? To get around rms rating of speaker??
Or you can just turn the amp down using the game knob. I show you the math here. th-cam.com/video/MBcGOoRJ4Ro/w-d-xo.htmlsi=BthOvDsjwUtFe4LQ
Sup man awesome channel....I have a 4 ohm dvc with a two ch. amp...if I run it 1 vc per ch. does that keep it at 4 0hms?
Yes
@@DIYAudioGuy
So does using a mono amp take that option away? Only giving you the option of reducing or multipling?What am I mising here?
@@Kevin-wy8kc If you wire the coils in parallel and connect to a mono amp you can run at 2 ohms and you should be able to send more power to the subwoofer.
Well that's the thing getting older and my Kicker 12 hurts my head now so I'm getting an 8 to replace it and my amp around 1000w @ 2ohms and the new 8 is an nvx 500w so I got it in 2 ohms to bring it up to 4 so I can get it in around at the 500w range did I do that right?
Why the cone excursion is high if I wired half the impedance of the amplifier???
Good stuff man! Great upload!
I think you know this trick!
Can you wire subs straight to a home receiver
That is a great question, join us on our next live show and we will try to give a detailed answer: bit.ly/3PYKG5P
What makes a sub 4 or 2 ohm , is it the size of the wire going around the coil or what?
I like to think of the nominal impedance rating as a shortcut that you can use to make sure that you've matched your subwoofers to an inappropriate amplifier.
Resistance of an inductor in an AC circuit will be a function of the frequency.
I have a skar evl 12 4ohm running on a kicker dx 1000.1 @2 ohms in a ported box
Amp is rated at 1k at 2ohm and like 1250 at 1 ohm
I’m thinking about changing my setup to a dual 10 box ported box at 1 ohm.
Would this make any noticeable differences? I want windshield flex
I also have a larger amp but tight on space
So my options are single 12, dual 10 or dual 8
I don't know how much power/cone area needed to get your windshield to flex, it will often depend on the car. But I suspect you are going to need a lot more.
@@DIYAudioGuy so my last system did the trick, kicker zx2400.1 paired with an Orian hcca 12. 2400w at 1ohm. Still have amp but the woofer and box took to much space. I’m hoping 2 10s on that same amp would do better then a solo HCCA but who knows
Good information for sure
Thanks.
I have a kicker l7 2 ohm dvc in the trunk and a box for two subs in the backseat. Ihave 2 svc 124ohm and 1 dvc 4 ohm. How do I get the maximum out of my 3000 w 1 ohm stable amp and i don't care if you don't recommend mixing impedances bc I'm ghetto af if u can't tell. I also have a Walmart 2500 that I ain't scared to run at 1 ohm even though it's rated for 2. i can't be the only person with mixed things i feel like im wasting by not using. Where do I go for information on this besides the hood bc the block is hot!? I decided to ask u out of vega, big d, or parker etc
Wire the coils on the DVC subs in series. Then wire all of the subs in parallel, you will end up with a 1.14 ohm load.
Is that Captain Spalding?
What's the matter kid Don't you like clowns?
I set my gains to whatever makes my speakers and amp not too hot 😂. Bass boost off clean bass for that specific amp.
That works.
So is the value of the inductance measured in mH equal to the value of the impedance measured in Ohms?
No, but there is a formula that shows the relationship between the impedance of an inductor as a function of AC frequency.
Was that a "BASS SHAKER"
Not exactly, but it's the same concept.
So if I connect a 4ohm crossover to an 8ohm subwoofer and an 8ohm subwoofer. What do I have?
It depends on how everything's wired and how the crossover is designed.
You won't get an accurate reading with a subwoofer or speaker turned upside down cuz it's pushing in on the rubber surround and that causes the nerves to go for them like you seen well set it up straight like you did other ones and read it that's why that one was 1.9 on this too
I love wiring my amps to half an hour home, had made my first fire a couple months ago, only because I bottomed out my subs though #smokey
Like I said, not recommended. But some people may want to do it anyway.
@diy audio guy I have a lot of impedance rise in my build so I wired lower to combat rise a little bit
love that shirt!
Thanks.
i put my sub on a wall outlet, a full minute of 60hz and it didnt blow, just sat there bouncing across the floor
Turn the woofer upside down and measure. What happens?
If it makes any difference it'll be completely inconsequential.
Box. Rise. It all makes sense. 🥰😍🤩🤪😜😝🤣
It rises
Transducer
Yes.
kind of funny (not really) seeing you talking to yourself on the display. thats not where your viewers are located, just mentioning.
It is VERY hard to not look at the flip-out screen. I have gotten a lot better at, but still not perfect. If I ever upgrade the camera I am going to try one with a flip-up screen. Hopefully looking up will be a bit less obvious.