I just scored a RM50 combo loaded with KH-1 and 1086 modules for $379. I took a chance with this from GC online. There was only one poor photo and very little written in the description. When I got it, I noticed that it had EL34 tubes and the stock Celestion speaker had been swapped for a Maverick speaker. The speaker appears to have some sort of dial on the back of the magnet that is labeled "Fully Attenuated" at the full clockwise position and "Full Power" in the full counter-clockwise position. I have not yet figured out how to turn the dial. Does anybody know anything about these speakers? Sounds like a cool idea, but I really have not had a chance to play the amp much yet.