PianoProdigy

I tried to find an answer by searching but couldn't find anything conclusive. I'm going to leave the stock HU in the car for right now since the car has a 6 disc changer. I'm going to add a sub and amp to the factory system. I'd rather not take apart the dash. Can I tap a signal wire that goes to the amp for the woofers behind the seats? My amp accepts both high and low inputs.

Thanks.

bazzle

Sounds like an idea. Filter on sub input should filter any too high.

Bazzle

PianoProdigy

Yeah, and my amp has a built-in low pass cross over as well. I have a post going on Benzworld as well. A member there is just recommending I swap out the head unit as it is pretty easy. I already have a nice head unit that is just sitting in my closet, so I may just use that.

justin1230smith

Swapping out the head unit is simple but may not be the easiest solution.

If your current head unit is running seperate amps hidden someone in the car then the only wires you will have coming out of your head unit will be "pre amp" levels feeds which will then dissapear off to your amp.

I am guessing your "spare" headunit has a built in amp ?

That means that it's outputs will need to go straight into the speakers NOT into the amp ?

So, what ever way you do it, existing head unit, new head unit - You really need to find where the wires are that go FROM the amp TO the speakers.

Once you have found them, in fact you only need one pair, you can take a feed from that into your new amp that is going to run you sub.

You could take a pre-amp feed from behind the head unit to your new amp but personally the chances of that splice mucking up the existing sound is higher by taking it there, it would take it out AFTER the amp - Lets face it, you cannot really hear SUB freqs, only feel them so you do not need the cleanest of signals to start with.

Just my opinion

PianoProdigy

Justin,

Valid points. I've talked to a member on BenzWorld who used the line outs from the Alpine headunit and ran them to the factory Bose amps and it sounds great. He needed a ground loop isolator ($20 part) and just changed one of the sides to a + and - wire configuration rather than the RCAs.

I'll definitely post up pictures and a full explanation once I'm done to help others out.

-Alan

70chevelle396

Why do you want to put an amp in there? When it comes with one already in it.

Ken

PianoProdigy

Amp & Sub. Stock system doesn't provide enough bass for my listening preferences.

Dylan

I pulled the wires from the rear speakers but remember they are running reverse polarity and you still need a remote wire to turn the amp on and that is behind the head unit. I can't remember the color now but its back there. Pulling the deck isn't that hard at all.