Dennis--the switch cuts down the voltage to the power tubes. Same 6L6's, not some alternative tube. And no, you can't remove one of a pair of tubes. You can remove two of a quad but bottom line is that the tubes are run as an A/B pair (in a class AB amp such as this), whether 2 tubes or 4, and they need to be in pairs. Ultimately, if you want to reduce output power (volume) in a tube amp but maintain a certain level of tube saturation, your best bet is a speaker attenuator.[This message was edited by Jon Light on 16 September 2004 at 04:56 PM.]
