i have a stock infinity gold soundsystem in my jeep gcl, but i want to add another amp and subwoofer, is there any easy way to do this, are there any preamp out rcas behind the stereo head unit?

No there are no extra Rca's behind the stereo. The Best thing you could do is buy an after market stereo to put in the jeep. the infinity gold system comes from the factory with an amp, i'm sure u already knew that, but i tried hooking up a sub and amp to my stock radio,and it fried the radio. plus the sound quality sucks with stock. u will more than happy with an after market stereo, the clarity and the loudness of the music is incredible. i have 2 jl audio w-6's and 2 jl audio 800 watt amps running them and my infinity sound system has yet to crack, blow or pop on so i am happy. hit me back if you have any installing questions.

you can buy a lead to rca adapter at kragen for 12 bucks if you really wanted to keep that factory stereo. get a low pass filter for another 10 and add the sub.

not enough amps to drive the sub - the stock infinity amp is only about 120W (!)... you can get an amp with speaker level inputs to drive the sub, or you can use a line output converter to convert the stock head unit outputs to RCA to feed the amp... check out www.wjjeeps.com (http://www.wjjeeps.com/) for some good audio info within... myself, i bypassed the stock infinity amp altogther (but tapped into the existing wiring harness so I wouldn't have to run speaker wires to all the doors)... if interested, you can check out what I did at www.cardomain.com/id/azflyingdiver (http://www.cardomain.com/id/azflyingdiver) (just one of many approaches...)

Good luck!

if interested, you can check out what I did at www.cardomain.com/id/azflyingdiver (http://www.cardomain.com/id/azflyingdiver) (just one of many approaches...)

Good luck!

oops - busted link:banghead:
try this one: http://www.cardomain.com/memberpage/589137