Tom Sholz Power Soak guitar amp attenuator. I utilized this with my old Sunn 100 watt amp to obtain some gain out of it and later on with a Marshall head with no master volume. If you such as, lets you turn the amp up to get the power amp tubes to break up and then turn down the output to room levels. It does create some heat!
E-mail, call or text five 6 3, 2 one zero, no six six two.