I am experiencing a slight hiss through my inboat speakers and tower (Rev 10s). The deck I believe puts out 4V to a WS420. After doing some research I see others are having this problem also and installed a line driver between the deck and EQ and this took care of the problem along with also making the overall system sound better. I think I have narrowed it down to either the Audio Control Overdrive Plus or the Arc Audio ALD. If anyone has any imput on this I would appreciate it, I want to make the best decision and only do this once.