Originally Posted by SinfulDragon
I'm not saying you have to spend high in the hundreds to make this a top end audio machine. Run to wally world and for $100 or so, you'll get a head unit, an adapter plate and car audio speakers that will crush the setup you are trying to cobble together.
I agree. Get an aftermarket HU. Most of them will have RCA's on the back of them. Car audio and home audio are two different beasts.
You might also look at line converters if your home system has RCA inputs. If so, that might work. But, a good line converter, to keep your stock HU, will probably cost more than a decent aftermarket HU.
Personally though, they are two different beasts. There is really no cheap way to get a great car sound system.
I spent around $1400 dollars on mine all total. I got 4-5.25 CDT speakers, Nalin front speaker adapter, a 7" DVD flip screen HU, Clarion 7-band EQ, Alpine PDX-V9 100wattsx4 + 500watts subwoofer amp, and a thunderform molded subwoofer Box with 2-10" subwoofers. Matching the speakers and tweaking the system, will probably give you the best car audio system to mimic home theatre surround sound.
Mine is really nice for car audio. I have seen other nicely built Jeep Audio systems too, but they aren't cheap.
Some people prefer to spend major money on lifts, winches and other off-road mods. Since, I'm not heavily into off-roading, I preferred to spend my money modding my car audio. (I threw in this justification for those who think I spent too much money on my car audio system.lol.)
My stock Wrangler is quite capable for my off-road use.
You can try the line converter, I think its LC6i, which would give you the channels you would need, if your home unit has RCA connections. True surround sound would normally require 4 to 5 channels, and sometimes 6.
The best solution would be to get an aftermarket HU, and see if you can adapt it to the home unit. If that doesn't work, at least you have the HU to make a proper upgrade for your Car Audio System. That stock cassette car stereo is really obsolete(I had it too), and you'll probably want at least Bluetooth, Aux-in, USB and CD player which you could get in a decent aftermarket radio for about $99. Some HU's have stereo enhancers, like mine, which even closer mimic surround sound.
You might also want to consider getting the sound bar, if you don't have it.
AudioControl LC6i (Gray) 6-channel line output converter for adding outboard amps to your factory audio system at Crutchfield.com