Ok, I just bought a few years old Z-5500, and as soon as it has power i.e, power cable plugged in and the main power button on, it starts humming.
I do believe that the sound is coming from the amp itself, and not produced through the sub? The sound does not get louder(or lower) when I turn up(down) the volume, it is always constant, no matter what settings, what is plugged in or not, no matter what room and where I plug it in the wall. hmmmmmm
1. Is there a solution?
2. Is it harmful to the system? Could It be a sign of a bigger issue?
3. Do I get my money back?