I don’t like attenuators at all for the same reasons mentioned above, so when I was experiencing your problem I was about to sell my SV rig with sadness. It’s really a great amp. Finally a member here talked me into the Weber Mini Mass 50 and I figured it was a cheap enough one last try. I had to go directly through Weber and it took two weeks. When I received it the decision to keep my amp was clear. It’s usable again. Even better for me is that not all gigs require me to use it or to use it at its weakest setting, just to take a little of the volume level. It’s the most transparent attenuator I’ve had up to this point.