Quote: Originally Posted by
leo_bergamo 
Hello,
From my experience most amplifiers will work fine when connected to the the "line out" on your sound card. You will need a 3.5mm phono to RCA adapter or sometimes known as a mini "Y" adapter. Hope this helps!
Leo
this will work fine for aftermarket amps, but factory amps are all over the board-- even in the same model car... if your amp is looking for speaker level inputs, this will not work, but if it has line level inputs, this will work...