No luck searching for examples of stock Bose unit humming while off.

Anyway, my system humms rather loudly when it is off - even to the point where I have to turn the unit on in order to drown it out.

I have an 05 grand touring with the sound system all stock. Any ideas if there's a quick fix or maybe something I should be looking out for?

Thanks
G

 

I would check the ground on both the HU and amp. Not sure if that is much help, but the buzz usually mean bad ground or you need to loop the ground.