I tried the 2x12 Combo at a store yesterday. Man...I was really impressed. Sounded great! Buh even the 0.5W setting can get very loud. I am a bit confused about the volume knobs though: there are gain, volume and master. Is "volume" the input volume of the preamp and "master" the input to the power amp? Or does "volume" drive the power amp with "master" being placed behind it as an attenuator that does not effect the tone?