Has anyone put a system in using the converter with there stock mach radio? Does it sound decent? I have 2 Alpine S series with a alpine class d amp but I dont really have the money to buy and aftermarket radio and amps to replace the factory ones right now.... How difficult is it to do? Thanks in advance!

 

Tap into the rear 'subs'. Your amp probably has an option for that. Or you can buy a line-level converter. Set the crossover and gain accordingly and their should be no problem.

 

It'll work fine but sound like crap.