Hey everyone! Im trying to install a second amp to my lancer separate for a sub but I do not know how to wire the signal for the amp to the car that already has the Rockford Fosgate system... Id like to keep the current amp underneath the seat for the door speakers, can anyone help me??

 

You could get a lc6i or lc2i (look it up). It taps into either the sub wires in your trunk if adding just a sub. Or your rear speaker wires if adding more speakers (rear speakers also work for hooking up a sub). From the lc6i you can then run RCA cables to your second amp.
Or you could buy any random line output converter at 1/4 of the cost, but the sound quality won't be there. (not recommended)

 

DO NOT hook them up to the rear speakers!!!!! run then through the back of the radio do a clean install.

 

If you knew what you were talking about you wouldn't say that. The lc6i is a good product. It converts the signal from speakers into a clean signal for a amp.

 

Heebs, you should never run the RCA's off the back speakers! EVER, i worked at a car audio install place and was a electrican in the Navy, i can tell you, say if you have a 4 rear speakers and you want to put an amp on it, then you would do it all behind the radio clean install and you mazimize you power output.

 

Yes agreed. But, i didn't recommend to wire rca's to the rear speakers. With the product (lc2i) you tap into the rear speakers and run those wires to the lc2i. Then you connect the rca's to the lc2i. It gives a clean signal to the amp. It has a sub output and output for speakers.
Its a very simple way to add a amp without having a new head unit.
And you are able to keep all the stereo controls on the stock head unit(bass,treble,fader,balance)

 

got i miss understood

 

Why doesn't someone make something that plugs into the stock amp harness, and then somehow RCA cables and a remote wire come out? (dreaming)?? lol
Seems like all the needed info/signal and what not would be there?

 

i have no clue i would just get rid of the stock amp and go with a better amp same size so it fits, but ther are so many applications you can play with ya know

 

How would you go about replacing the amp on the stock head unit. Leaving all the stock wiring(except power and ground), and still have the sub control/bass/treble and steering wheel controls.
Id love to do that but i just don't know how.
There must be wires that act like RCA cables running from head unit to amp?

 

i really don't know what the stock ampo looks like let me do some reasearch and i will let you know what ya gotta do

 

http://www.crutchfield.com/p_142SLC4...4.html?tp=1276
but do you have the NAVI Screen or just like regualr? or do you have the 6 CD Changer

 

Sorry to bring up an old thread but I'm a little confused on this LC2i device (and maybe even how the wiring in my car is, I'm basing the attached diagram off all assumption and haven't actually looked at any of my wiring). Attached is a picture showing what I believe the wiring diagram looks like. Now my question is does the LC2i device tap into spot 1 or spot 2 (spot 1 being the left arrow and spot 2 being the right arrow for some reason the text there didn't save).

 

is there no RCA imputs in the back of your radio? is it the NAV or just aregualr?

 

It's the stock navigation system. No there is no RCA's in any part of the system.