Does the factory head unit send pre-amp voltage signlas or speaker level outputs to the factory "premium" amplifier?
The installer claims the factory amp has pre-amp inputs.
The kid who installed my system, even though I said he needed to BYPASS the amp with the MET BYPASS harness when I dropped off the car, used a "line level convertor" harness.
I figured that meant he took the speaker level outputs from my new head unit, and sent them into the factory amp, so I checked with the installer. He admits he did not bypass the amp and will redo the work (the manager chewed his ass out).
I hope the Sony 7050's amp (19W RMS, 50W peak) will be louder (I hope the factory amp is only 10W RMS!!!).
There is no noticable distortion even with the volume maxed out - nice. But, the somewhat low volume makes me wonder if the installer used preamp outputs into the factory amp, but should have used speaker level outputs.
The system sounds great (4 Polk dx7's and a so-so Sony 12" sub with a 140w RMS, 300W peak amp (pretty much all the sub is rated for) in a sealed box. It's just enough bass, which is a little disappointing.
