I'm getting a slightly overdriven sound from my amp that I just noticed with my new Wizzy 10. At first I was afraid that it was the cab, but checking it with my old CXL112, it is present but not as loud. It is only when I play a note (or make any sound with the instrument), so its almost like a bad gate or compressor type thing? I've tried different basses, instrument cables, and wall outlets and it is still present. The amp is a GK700RB, about 7 years old.. I thought it might have been the impedance of my realists not matching the input on the amp, but it is present with electric basses as well...any ideas other than buying a better amp??