So I bought an 04 350z with the Bose premium sound system that came with an aftermarket Kenwood DNX 570 HD head unit. The sound quality is garbage and it doesnít get loud even on full volume. On top of that, the subwoofer is providing virtually no bass; however with my hand over it I can feel it is working softly. Iíve gone through and messed with all of the equalizer settings but canít seem to make it sound the way a Bose Premium sound system should. Iíve heard it can sometimes be issues with the amplifier and I canít seem to locate any aftermarket on in the car. Any ideas as to what the issue could be?