listened to this amp last saturday powering Vollas... smooth sound, played a couple of operatic metal tracks and the guitars that on other amp/speaker combos sounded "live" because the "distortion"/overdrive effect had distortion that can hurt ears at some point, these played nicely. smooth and warm, like I had an ESP 6 string through a Mesa Boogie in my own bedroom, the sound characteristics at 20%-25% gain on the MB only much louder through the cayin and volla.