Audio Systems: Car audio Installation, rockford amp, rca outputs

Question
I just purchased a 2004 Jeep Liberty.  I took my system out of the old car.  I have a box with two Infinity 12's; a Rockford amp for those subs; a Kenwood amp for the rest of the speakers.  I would like to continue to use the factory deck but I would like to connect this system up to what I have.  I have various speaker cables and I have a power distribution block that I ran 4 gauge from the battery to it and I ran 10awg from it to the amps.  I need to know what I may need to complete the installation?  This is what I'm thinking; Run the power from the battery to the power distribution block and split the power to the amps.  Break the front and rear door speaker feeds and feed them to the Kenwood and then out to those speakers.  How do I fit the subs into the equation since I don't have any RCA's on the factory unit?  The Rockford amp is a two channel amplifier and the Kenwood is also a 2 channel amplifier.

Thanks,  

Answer
Shawane,

 Ok i normally dont recommend mending aftermarket components with a stock head unit just because you dont get as much quality and performance and its a pain to wire everything up.. now you have the power good run the juice and the ground from the battery and the ground from the frame/body split with blocks if you want.. now here is what you need is a converter block you can buy them at radio shack or even walmart i think for about 10-15 bucks what this will do is take all your speaker wires *which you have to splice into and run to the block* and convert them into RCA outputs just like the back of an aftermarket head unit .. this will allow you to get your sound feed to your amps a little easier.. now the other method if your amp is equiped for hi-imputs is run the wires directly from the speaker wires into the hi imput on the amps * this is a little more messy and not as stable as the box but either way will work* .. now dont go and buy 2 converter boxes if you go that route you can use just one with splitters to run both amps with then you can tweek your freq's adjuster and crossovers on your amps to get what sound you want to what speakers.. now you have 2 channel amp to push the car speakers if you have a 4 speaker set up use the front speaks for one channel and the rear for the other.. hope this helps you out if you need anything else or i missed anything just let me know

thanks