I'm really impressed with how the concert lead head powers for being as old as it is! Man that thing is sick, sick loud, I wont put the old 410s cab to any abuse over 3 1/2 on the volume. I'd hate to blow it up, ill use a newer cab to abuse if I wanna get loud. Honestly, for non concert use it's really way too loud. Anything past two on the volume gets my wife mad as hell! LOL! I really like the tone out of it, Sounds best with my Gibson Maestro Fuzz Tone FZ1A pedal through my Gibson SG. It has just a great Vintage tone. Really old buzzed up Beatles or Rolling Stones sounds right on.