I don't attenuate any of my amps, but recently, a friend bought one of my JVMs. But he was having a little difficulty controlling the volume in a small room. We stuck a TS-9 pedal, turned down the gain and volume, and we were able to attenuate the volume. So, are there any harmful effects in reducing the loud amp volume with a footswitch? Why do people buy attenuators when you can reduce volume using a footswitch? Thanks for your input.