I got some advise from here before to add an amp to power door speakers. Right now I have an amp wired to the trunk sub (12" JL) my head unit has 2 rca outputs(I used the rear one to the amp). Caould somebody tell me the easiest way to connect the second amp without taking the car apart again. What should I use for the input (the other amp has rca input that reads High and wire input that reads Low) and the wires that are going out, can I splice them somewhere maybe closer to the back.

 

well, how you do this, depends on what features your two amps have on them

if amp A (the one you have in there now) has something called RCA pass through. you can just hook up the RCA inputs of amp B (the one you're doing to add) to that.

if amp A does NOT have RCA pass throughs, and you really REALLY don't want to run another set of RCAs all the way to the head unit, I suppose you can hope that amp B has a set of 'speaker level inputs' and hook that up to amp A's speaker outputs.

expanding on the second method, maybe you can purchase a LOC (Line Out Converter) to make the speaker outputs of amp A into RCA and then hook amp B to that.

personally, I think the first method, or if you're willing to do the work, wiring amp B all the way back to the head unit would give better results. This is because maybe you have some gain settings on amp A that you dont want to pass onto amp B. Imagine if you turned the gain up on amp A for the sub. now you're splicing into the speaker wires, and you have gains on amp B. You'll be working with a 'distorted' version of the signal. Not really what you want for sound quality. Even worse, maybe you have the amp on a low pass filter for the sub. There's no mids and highs coming out of those speaker wires. If you intend to hook up door speakers to that signal, it'd be pretty nasty sounding.

usually .. extra work pays off good luck.

 

Ok, I will run the RCAs back to the head unit again, but what about the door speakers - where can I splice into them, without going back to the HU or breaking down the doors???

 

wait a sec. I probably did not realize what you were trying to do at first. Are you trying to power your stock door speakers with an additional amp? or are you trying to replace the stocks into the doors and hooking up an additional amp? Either way, the 'stock' wiring to the door speakers are located behind the head unit. Unfortunately, if your purpose was to "splice" into em.. you might be better off just rewiring since you're going to have to pull wires that far from the trunk to the front anyway. Otherwise, you can mount your amp maybe under the seat? that'll give closer access for both the RCAs and the speaker wires. that way you can splice to your heart's content.

If you're gonna use the stock speaker wires, you might definitely want to hook up southbound's terminator mod