Like he said... an attentuator would be your best option... rather than messing with a perfectly good amp... I've found that in just about everything... Once you go messing around with something, it will never be the same. So, in that regard... I also suggest getting an attentuator. THD makes a really nice one. An attentuator allows you to crank the power supplied to the tubes so you saturate them enough to get the full tone... while allowing you to control the volume of the output without sacraficing the tone... They work great. Check them out....