[spy23714]

Anyone have any pointers or diagrams or anything? I'm adding a sub to the factory head unit in a friends car and I'm looking for any help I can get...thanks.

[coolwaterblvd]

You can get a splicer that ties into the speaker wires that converts the signal into RCA's wires. I will say the sound will not be like u think with the amplified signal from the mach 460 I eventually got a different head unit and just ran wires. It sounds so much better now. It also dropped about 20lbs by taking out the rear box, and got a lot more room for a box. You can also get some good cash by selling the old mach radio and amps on ebay.

[spy23714]

It's not my car, it's a buddies and I'm not sure if he wants to get the new head unit or not. Either way, it's not my deal.