bridging 4-chan amp.....

[graffix989 10+ year member]

ok ive got a 1600wt amp, aka 400x4 pushing two 15 subs @ 1200wt each. ok so i tried bridging each channel to make it a 2channel amp.. as in, i bridged the front outputs to my left sub an the rear to my right sub.. this didnt increase the noise at all, it acualy decreased it. and yes both subs are 4ohm along with the bridged connections on the amp. i doupt thats the problem. the only thing i could think of was the inputs for the amp.. ive only got a single set of rca cables running from my head deck to the amp. so to bridge the 4ch to 2ch i had to use the left in the front and right in rear. so ive got only 1 input (eithor R/L) on each of the front/rear inputs... when i hooked both of em up simultaniusly to eithor the front or the rear inputs, it seemed to get louder.. does this matter?? or am i focusing on the wrong thing. i assumed when u bridged a connection it became mono, lol but its already only a single L or R channel comming in (the way i hooked it up) should i run another set of rca cables so i can have all 4 inputs occupied? another thing is i dunno if i hooked the bridge up right in the first place... this is my setup.

inputs:

right chan. to rear/right input

left chan. to front/left input

outputs:

sub1/pos - front/left/pos

sub1/neg - front/right/neg

sub1/pos - Rear/right/pos

sub1/neg - Rear/left/neg

additional note: im an electrical manufacturing engineer for agilent tech. so you dont have to dumb stuff down for me....

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[pavengmike6 10+ year member]

YOu do not need to get another set of RCA's, just go buy 2 Y splitters (1 female to 2 male connection) then you can use all 4 inputs off 1 RCA.

As for the bridging your amp you will need to look at the manual. Different amps do different things. Look at the OUTPUTS and it should say + - +- then above it, there will be another +_____________- that says bridged. (only on some amps) YOu may NOT be able to bridge your amp, if it is not set up internally to do that.

 

[graffix989 10+ year member]

ya its bridgable, i set it up just like the manual said... but i dunno if the both the right and left channels will turn on with just one of em plugged in... so just to be sure again with the x-over.. 1sub should be on + from right/front and - from left/front, meaning that the other set of +/- should be left empty..correct?? and the same for the rear channel?? or do i need to run both + from Right/Left on each channel...

 

[n2audio 5,000+ posts]

but i dunno if the both the right and left channels will turn on with just one of em plugged in... 1sub should be on + from right/front and - from left/front, meaning that the other set of +/- should be left empty..correct?? and the same for the rear channel?? or do i need to run both + from Right/Left on each channel...

Your question's been aswered.

YOu do not need to get another set of RCA's, just go buy 2 Y splitters (1 female to 2 male connection) then you can use all 4 inputs off 1 RCA.

 

[pavengmike6 10+ year member]

ya its bridgable, i set it up just like the manual said... but i dunno if the both the right and left channels will turn on with just one of em plugged in... so just to be sure again with the x-over.. 1sub should be on + from right/front and - from left/front, meaning that the other set of +/- should be left empty..correct??
That is the correct way. Go buy the Y splitter plug them in and you will be done.