This is quite possibly the best information/demonstration on this topic that I’ve ever seen. Thank you for sharing this. It’s videos like this one that make searching through youtube absolutely worth it.

I'm officially addicted to your videos due to the fact that the content is so rich in information that I'm learning at a rate I find to be extremely satisfying. When I found your amp repair vids it was such a big find for me personally and I've been finally learning things about amps and electronics in general that I've been dying to know for a long time. Thank you for the very potent and deeply interesting content you post.

Thank you so much! I am getting my 2nd amp back from repair today and have been gain matched and will now switch to this way.

Can we find those 19 people who disliked this video and hook up their brains to a car battery?! This is the most brilliant free information I've ever encountered on KZfaq

You are absolutely brilliant! This is the third video I have watched by you that has given me an "ah-ha!" moment! You have a brilliant way of explaining things.

Using phase cancellation for setup, cheap simple and gets results, genius!

This is amazing for anyone who lacks the required scope in order to do this analog/digitally. Instead you show an excellent way to match the amplifiers so that they work together instead of against each other in the subwoofers two coils. Awesome video man!

Totally want to try this in my spl setup and see what gains I see! Awesome!

thats genius my guy

Thank you for this. Such a simple solution I've never thought of before. Absolutely brilliant!

Best information on gain matching and strapping amps anywhere! Thank You !!!

I would love to see the o-scope output after you've done the tuning as you suggested. Looks like great advice, but proving it out via scope would be great.

This is similar to how ac generators are phase matched when hanging up or connecting to the grid except you just use a bulb across each phase. Different way of wiring it but the ideas the same, you "tune" for a no bulb. Just as you are for no movement. Novel and simple nice one.

I did it with 4 15's on 2 3 k's. It took alot of 8 gauge wire (alot) but it was worth it. This guys a genius! Thanks for the tip!

i told a friend of mine about this video and his system sounds realy good now, keep up the video's man, I love them

This video just taught me the most . Out of anything anyone has taught me about amplifiers. Thank you. I liked and subscribed. Cant wait to learn more from you!

Very smart way for phase alignment I would have never thought of this.

I'm just about to go from a single DC 3.5k on my 4x sav2 15s, to a pair of JP23's and was curious how I was going to make sure all the amp where going to be identical without a dd1 - only using a multi meter. I don't like strapping either. So I am going to give this ago. Appreciate the video, I found this extremely helpful

This is an absolutely fantastic tutorial! This is exactly what I will need to do for my 8x JBL W12GTI's on 2 5k's when it gets built. Thank you for your concise explanations! You're the man!

Nice thinking out the box, another phase gremlin identified & dispatched. Those tweaks will also improve the transient response, as well as the additional gain.

Brother u are an ocean of knowledge which can really benefit the community. Keep up the good work. Really appreciate your videos.

The way he wired those subs is amazing. Never thought about splitting the subs like that.

One of the best demonstration video on KZfaq

It's been said before and I'll say it again, freakin' genius. It's amazing what you can do when you understand the technology you're working with.

I done this and it worked great. 2 Cab 4500s and 4 Skar VXF 15s. Had a significant gain in output. Thanks for the great info.

So glad I found this video and your breakdown! This is what I was considering doing with my two subs and amps. Just saw the reason for amp power output to be as close as possible. You are a very smart man and bring a ton of knowledge and common sense into the car audio tuning and setup game.

the best video on this subject ever!!! one of my take away's is most bass heads don't have the tools or knowledge to link amp's together.....or run multiple amp on multiple woofers.

Freaking good information.. Helped me in making my mind to head for single large amp instead of dual identical.. I just skipped such hassle

First off I have to say that you are absolutely brilliant sir! I have two questions though. First, do you think the Hantek PC based oscilloscope would be a good budget friendly tool to do this? It's an 2 Channel oscilloscope under $100. Secondly, is it the same process for gain matching 2 amps without the phase flip option that each power one Subwoofer? And lastly is more of a request. I know this is a bit of a lengthy explanation, but do you think it's at all possible to do a step by step tutorial? I feel like the straight forward step by step tutorial would be a great addition to your videos, and this current video can be used to reference back on for explanations. But all in all you get a solid 20 on a scale of 1-10 brother! You definitely hit the nail on the head and the ball out the park! BASS ON!!

Thank you very much sir after I watched this video I finally fix my audio system... Its been a long time for me to figure out what to do cause my ear tells me I have a signal phase issue even though I gain match my amplifier at exact output voltage. You are a great teacher for me sir and from now on I will watch and subscribe on you... 👍👍👍👍👍👍👍👍👍👍

Now that you started sharing all this amazing stuff. I love you mate. Thats genius. Thank you so much!!

Thank you so much! so simple and smart. Don't forget about clipping!!

This is a great method, but with one amp per coil with a small phase difference in each coil this small difference between the coil increase the voice coil heat. So always match perfect the gain with multimeter :P Sorry for my bad english.

nice. This would explain the issues I was having with my two hifonics amps.

This is pure brilliance, thanks, learnt loads! 😊

This is similar to how I find the perfect crossover frequency/slope between subs, mids and tweets. Reverse polarity on one driver, play with gain and delay(phase), look for the deepest most symmetrical null you can get, then reverse the polarity back.

ive done this same practice for years :) amazing video, its quite hard to explain this method to friends that have a ton of money in stereo's :) always turns out the best for me!

You're a genius, Sam. Thanks for sharing

Just a quick one, sam mentions using one amp to adjust the gain and the phase, however if the phase knob adjustment makes the movement worse straight away you need to tweak the phase on the other amp, gain is in the middle, phase is at one end of the scale so in theory you can adjust gain up or down, but the phase may need to move back or forward, so you need to use one amp for back, and the other for forward and see which works best 👍🏼

Im totally phased out 😮 Nice explanation bro.

Thank you for sharing this. I am currently using 2 amps on 4 Subs just like you've shown in this video and I have the inputs configured as master / slave but each amplifier is individually running its own pair of subs rather than strapping the outputs together. I just assumed the amps would be pretty closely matched this way but it looks like I'm probably wrong. I will definitely try what you've shown in this video. Update: I haven't rewired the subs yet but I did check the output voltages and found a significant difference between the output of the master verses the slave amplifier. I forget exactly what it measued, but basically the slave amp always had less output than the master even when I tried swapping them around. I ended up setting the amp gains independently as close as possible and that alone made a noticeable difference.

I hate how smart you are it makes me feel so dumb lol I'm kidding im glad you're smart and kind enough to share your knowledge with everyone

Hello and greetings from the USA. Great video I will give this a try with my 2 dd m2b amps. I will keep you posted.

WOW bro for as young as u r u definitely have a lot of Knowledge and Skill im really glad i found ur channel and the wat u explain things makes it so much more easier to understand im shr i speak for most of the fellow BASSHEADS out there when i say i truly appreciate all ur informative videos bro 👍🏼👍🏼✌🏼💪🏼🔈💪🏼🔉💪🏼🔊

Best Vid on this Subject..!!.Great Work..!!.thnx..💐🙏☝👑

Brilliant! Can't wait to to use this information on my upcoming build. 4 Skar evl-15s on 2 skar SKV2-2500.1D

Hi there. I have just finished setting up the system in my 2011 E90. The source unit is a DEH 80PRS and the amplifier is a JBL GTR 7535. There is a dilemma I have run into. When testing for max volume at the headunit, depending on where I connect, it clips at different volumes, so for the sake of argument, on the front channels it clips at 59 out of 62 on the rear it clips at 60 out of 62 and on the sub it clips at 58 out of 62. This part is fine, I just stick to 57 and plug the RCA's into the amplifier. When I hook my mini oscope to the speaker output channels, even before touching the gains, I have to turn the volume down at the headunit to 50 in order to get a clean signal. There is a switch on the amplifier that says "Low, HI1,HI2" and the manual says to use the setting at Low if using line level signal. Now the thing is on the sub channel, I don't need to touch the gain at all and the other two I need to slightly. Is the amp underpowered? Is there something I am missing? Thanks

Ohhhhhh! Love this video! So simple & will be correcting 2 things on my system immediately.

Expert level 10 information right there.

Bro ur a badass wen it comes to setting up systems i give u 👍🏼👍🏼 for this video i bet everyone tries this i can tell u r a really smart dude but the way u explain it for us dumdums makes it so much easier truly 💯 appreciate all of your videos ✌🏼💪🏼🔈💪🏼🔉💪🏼🔊

G E N U I S Thank you for always taking time to share!

Never see or heard this before but it's a great idea keep up the good work bro

This is absolutely genius!!!! Thanks for the info!!!

Great video I know what I'm doing tomorrow! I have 2 JBL club A monoblocks strapped on my American bass VFL18...I'm going to run 1 amp per coil! Cause I know they are not putting out what they should be strapped!

I have a question, you say in one video that you should set gains with subs connected to amp for proper load on amplifier... but if I'm running 2 amps, 2 dvc subs split down the middle, i.e. left coils on amp 1 and right coils an amp 2, how would I properly set the gains on each amp with speakers hooked up and not hurt the speakers? I do have a o-scope and multimeter, so I assume I wouldn't have the speakers connected to set gains, just check the phase after I set the gains.... hope I'm asking this right.

Thanks bro I never even thought of that

This is a great video. Thank you for the knowledge barevids.

That is awesome fella thanks 🙏🏾 for sharing

Genius. Absolutely amazing theory. When I get my second 8k I will be trying this for sure! The only thing that's unfortunate is that my amps don't have a phase knob. :/

That's was a great idea... Man.. Really.... Change the life of subwoofers

I had a question about this!!! Very very good information I loved it! But after you match the subs and then switch the positive and negative back do you then set the gain? Or have all the gains set and then turn the volume down and then use a low voltage to phase and all that like forwards the end of the video?? I would love how to do this perfectly because then I would rather gain match rather then strapping

Great info, presented excellently! Louis S.

Wow, great video. Thanks for posting!

AWESOME DUDE! FREAKING GENIUS!

Fascinating method.

This is exactly what I have been looking for I've got 3 subs and two amplifiers.

Nice! I've been having trouble, definitely doing this.

Bro i had this exact same issue. Thank you. I fixed mine and gained db

Very good I never thought of doing it that way

This is Awesome. i am trying this on my next build.

wow that makes perfect sense!!!! I guess you learn something everyday lol

Damn bro ur a badass u kno ur stuff im glad i subscribed to ur channel ur videos r very informative thanks and keep em coming ✌🏼🔈🔉🔊

Love your videos man not really an spl guy but this is still great info for any basshead

In my experience gain matching amps only work at one specific frequency and at one specific output voltage. As soon as you move from any of those two specific points, the match is gone.

That's a great way brother I'm goin to have to give this a go when I hook my other amp up

I remember discovering this method with you at Modnats

Very hadny piece of information thnx for sharing

Sounds like Texas weather

Thank you so much for the great info ! Keep Bangin !!!

Alright I went ahead and gain matched one coil per sub wired to each amp. I must say it was fun doing this. I will be doing a video response to your video as well as a barevids shout out on my channel. Peace and Bass

Simply brilliant! Bravo!

Great and informative video, thanks for sharing.

Barevids, absolutely love the videos! I have a question myself. Currently running 3 dvc d4 subs at .67 getting split on strapped 5ks and obv my amp protects near my max volume bcuz of how low my ohm load .....I've also tried to run 3 coils per amp, but got crazy impedence rise. I tried multiple different ways to wire these none of which Im happy with. Seems the most I can clamp from two 5ks is 3100w, which doesn't seem right to me. Rn all my coils are wired individually with 12g all ran to the same box terminal then my strapped amps attach to the box.....I was wondering what would happen if I unstrapped them, and ran both amps to a distro block and ran my speaker wires to the distro?

very interesting i will give it a try next time i'm changing something to my box

This would also affect efficacy? Williston audio labs did a strapped dyno of jp amps and the effency dropped from 80-90% down to 70-80%. Wonder if the amps wernt properly gain matched.

I did this with my setup an yes i stand behind this method 100%

Great video. It's still very useful. How can i add phase adjustment to an amplifier that doesn't have it? Can i use delay in a dsp to do the same? Can i add something hardware in the RCA to do it?

Man I love your channel I was hooked after just one vid about box rise. Great insight. Where did you study.

Question… If he had two subs per amplifier, couldn’t he just swap the negatives or positives the all subs would see the same power & phase right?

I just did this and my amp blew up immediately , not even kidding it’s 2:49 am and I tested it out in a parking lot. I think I staggered them wrong though, I wired coils in parallel before I staggered

Very informative videos. Thank You.

And doing this last part buy flipping the phase on the sub, isn't causing any problems back into the amp (we r kinda joining positive and negative together correct)? I'm about to try it with two DD 2500a. I think this is way smarter than strapping. N I trust u over anyone with car audio at the moment haha. Just the phase flipping thru me off. To me it's seems to b like accidently touching ur positive and negative speaker wires from the amp together? Thanks Sir. U say low power 5 to 10 watts or so but still that scary to me.

I am convinced that Sam is the smartest human on planet earth 🌏 😎

HOWEVA!!! Great vid bro..Im going to try it tomorrow

Great video and tips. Thanks

How would I do this with two MTX 1501 d amps running on four MTX DVC 2 ohm 5500 10 inch subs, with a two chamber center port with a divider?.... This box is going to be approximately 55 in long in width, 14 to 16 inches tall and about 17 in deep. The port will be coming to the center of the box with a divider splitting the port.

big trick ... have u solution for subs have only one coil? in same enclosure does it work?

Great video love your work

Now I completely understand what your doing but I seen one thing I have to ask. When you strapped them together, the signals from the amps we're out of phase. But aren't they supposed to be since the master amp runs the positive side of the coils and the slave amp runs the negative side of the coils? If those two signals were in phase then the coil would lock in position as they would be fighting to go up and down at the same time or am I wrong on how magnetism works. I understand their gains were still not matched for output but if the master is on the positives and the slave is on all the negatives, theen the coils are seeing the exact same power just like how you did with wiring one set of coils to one amp and then one set to the other. Just wondering.....

bloody hell Sam. You're an audio genius! I do have one question though. How would this work with single ohm woofers...or wouldn't it?