Balanced output phase( 1 for the techs)

Hi all :) ....
      What I'm trying or hoping to achieve is to obtain two out of phase signals from the sub output of my dsp so I can send two signals 180 degrees out of phase to bridge an amp that wouldn't normally be used in such a manner .
I understand pin 1 is ground and pin 2 and 3 are signal out of phase with each other !? Unfortunately my dsp hasn't got the ability to change the phase on it's outputs in it's programming or I'd just do that.

I should add I appreciate the potential for failure to the amp I'm trying to bridge as it's manufacturer /designer Hasn't implemented this feature but as it's a relitively cheap piece of equipment and I like to play I'm willing to take the risk .
Iv done the same with amps in the past with solid results using the output of a dcx , unfortunately my dcx is in England and I'm in Australia and I now have a dbx driverack pa .

Anyone??? :)

So your saying it's a technically sound move? Pin 1 is ground , pin 2 is live in phase and   pin 3 is live 180 degrees out of phase with pin 2! ?

It's also worth mentioning I'll be sending signals to unbalanced input on amp but can't see how this would make any difference , providing 1 Channel gets ground and pin 2 and the other gets ground and pin 3 !

I suppose I should class pin 3 as out of phase and use the positive speaker output of this channel as negative !?

Again I suppose it's kinda irrelivent as long as both channels that are being bridged are out of phase and the speaker running off the amp matches in phase with rest of the system

Edited by matty w - 26 July 2014 at 10:55am

Plenty of ways to do this - easiest may be to swap the polarity on one of the amp inputs - ie swap 2 and 3 around.


Otherwise, here´s a few circuits:


You only need one half of these - they swap both L & R - for bridge just swap one:










Or to simplify:



Or even simpler:

Well I done as I said I would after lots more reading and prior to the latest comments I mite add and everything seems to be working fine , double power from amp with no excessive heat build up or funny smells .

I understand the circuit diagram but fail to understand the importance of the need for said components ?

When I say I understand the circuit diagram , I mean I have a very basic idea of what the symbols mean , not what the circuit is actually doing .
I shared the ground ( pin 1) of the left (mono) sub output of the dsp with the ground on two seperate rca cables . Then I wired the live on let's say Rca cable (a) to (pin 2) on the sub out and wired the live on rca cable (b) to (pin 3) on the sub out .
Rca cable (a) went to left rca input on amp .
Rca cable (b) went to right rca input on amp .

Speaker was wired to both positive terminals on the left and rite channel of amp !

Thankyou bro but still lol , what's the purpose of all those resistors?...... Intrigued!