Has anyone added an aftermarket amp to the factory HU? Any problems with bass attenuating at higher volume levels? I am about to add a system to my 04 screw and i don't want any surprises. Also, how do I find a trigger voltage for the remote turn on for the amplifiers? any help would be great.
New system: MB quart RCE-213 5 1/4 Components in front doors
Alpine SPR-57c in rear doors
Infinity 1040w 10" in homemade box under rear seat
Hifonics TXI6406 Titan 4 channel for the Quarts and sub
Sony 55W x 2 for rear doors( old amp)