I just installed my amp (mmats 1600.1) and the amp it's self makes a hissing noise with the power on. It also makes the same noise (but it changes pitch) in the subwoofer.
I tried unplugging my rcas and turning everything on and the noise is still there.
I couldn't set my gains with the DD1 because it would pick up dist. almost right away.
Any ideals on what could cause this?