Amp question

[Mynameismcgyver 6]

I have a BL 15 D2 running at 2000W (bridged) 4ohm on my US 2000x currently.

Would hooking up each coil to each channel yielding 1000W at 2ohm to each coil make any difference?

I would say no because 4ohm is more efficient?

Thanks

[vladd 26]

Nope, the amp sees the exact same ohm load. Bridged 4ohm the channels are still seeing 2 each.

one way may be slightly more stable than the other, but that shouldn't make a difference.

[rodolfo28 0]

I have a BL 15 D2 running at 2000W (bridged) 4ohm on my US 2000x currently.

Would hooking up each coil to each channel yielding 1000W at 2ohm to each coil make any difference?

I would say no because 4ohm is more efficient?

Thanks

Be careful if connecting each voice coil separately as the amplifiers outputs have to be exactly matched or else you might damage your speaker.

You're better off driving the sub at 4 ohms bridged.

[95Honda 486]

Be careful if connecting each voice coil separately as the amplifiers outputs have to be exactly matched or else you might damage your speaker.

This is 100% a myth.

The outputs never have to be matched when running seperate coils with seperate channels or seperate amps.

Either way you want to do this is fine.

[rodolfo28 0]

Be careful if connecting each voice coil separately as the amplifiers outputs have to be exactly matched or else you might damage your speaker.

This is 100% a myth.

The outputs never have to be matched when running seperate coils with seperate channels or seperate amps.

Either way you want to do this is fine.

Could you comment more about that? I'm no expert but have been researching on these topics for years...

[95Honda 486]

There isn't much too it really.

There is a magnetic field generated by the coil. The more the current flows in the same direction through the wire in the coil, the greater the magnetic field. The greater the magnetic field, the more the cone moves. You could break the coil into infinite sections (like dual or quad coils for example) and feed each section current, as long as the current is going in the same direction (amplitude does not apply in this equation) it builds the magnetic field, it builds it additively.

That's about it really... The voice coil windings can't "fight each other" because there is only one magnetic field generated, not two or more fields... If there are different phase relationships you will have cancellation, that is it. But that isn't ever the issue with matching different drive levels... The cancellation only lowers efficiency anyway. It doesn't cause overheating (we are talking only a few degrees of phase here) or anything wierd.... You won't ever have serious phase issues anyway, unless your equipment is broken. Even then, it still won't cause any damage unless you seriously try to....

People have made this up. Nobody has ever blown a subwoofer any faster because of different driver levels to individual coils.

[rodolfo28 0]

There isn't much too it really.

There is a magnetic field generated by the coil. The more the current flows in the same direction through the wire in the coil, the greater the magnetic field. The greater the magnetic field, the more the cone moves. You could break the coil into infinite sections (like dual or quad coils for example) and feed each section current, as long as the current is going in the same direction (amplitude does not apply in this equation) it builds the magnetic field, it builds it additively.

That's about it really... The voice coil windings can't "fight each other" because there is only one magnetic field generated, not two or more fields... If there are different phase relationships you will have cancellation, that is it. But that isn't ever the issue with matching different drive levels... The cancellation only lowers efficiency anyway. It doesn't cause overheating (we are talking only a few degrees of phase here) or anything wierd.... You won't ever have serious phase issues anyway, unless your equipment is broken. Even then, it still won't cause any damage unless you seriously try to....

People have made this up. Nobody has ever blown a subwoofer any faster because of different driver levels to individual coils.

Thanks for that info man! So it I have 2 amps a RF 200.2 and a 225.2 ( The old punches, the first makes about 400 watts and the latter about 450). Do you think it would be ok to hook them up each at a voice coil of a dual voice coil sub?

[95Honda 486]

I won't hurt anything. You just have to make sure they run out gas at the same time. If you have one that say starts running into clipping at 1/2 volume on your headunit, and one that does at 3/4, then it will start sounding like ass at 1/2 even though the other amps has some left in it. This is where you would want to match voltage if you could....

Now additionally, remember how I said the phase differences cause cancellation? Since those 2 amps are completely different, they may have signal processing (boost, X-over, etc) That introduces phase changes. If you have enough phase differential, your losses from cancellation could be greater than what you are getting with your power gains.

So, unless you Really, Really, Really know what you are doing, it might not give you the results you are looking for...

[rodolfo28 0]

I won't hurt anything. You just have to make sure they run out gas at the same time. If you have one that say starts running into clipping at 1/2 volume on your headunit, and one that does at 3/4, then it will start sounding like ass at 1/2 even though the other amps has some left in it. This is where you would want to match voltage if you could....

Now additionally, remember how I said the phase differences cause cancellation? Since those 2 amps are completely different, they may have signal processing (boost, X-over, etc) That introduces phase changes. If you have enough phase differential, your losses from cancellation could be greater than what you are getting with your power gains.

So, unless you Really, Really, Really know what you are doing, it might not give you the results you are looking for...

Really interesting... Both amps have the same crossovers and boosts the only difference is power.

[Mynameismcgyver 6]

Good info. Thanks

[95Honda 486]

Really interesting... Both amps have the same crossovers and boosts the only difference is power.

Then it should be fine.

What most people don't realize is that there are literally millions of drivers being used this way right now. For those of us around during the single pasive sub and sattelite craze of the 80's and 90's (before power subs became popular) we have seen this before... In this application you often had a single dual voice coil driver having each coil driven by the left and right side of a 2 channel power amp. This would be two different, often very different signals. There has never been a driver that was destroyed because of this. Seriously, I think that everytime someone says the signals have to matched has no idea that this has been common place for so long....

[seanbw 1]

Good info. Thanks

x2. super useful, thanks tech team!

[Aaron Clinton 2,372]

Yay tech team!