Goone is somewhat correct. I own BAT gear with and without the 'Supertube'. I would say that the 6H30 is more dynamic and transparent than the 6922's, like Goone said. The only difference I would say is that the 6922's CAN be smoother and more musical, but only NOS, not the Sovtek's. I have Amperex 7308 PQ's in my VK-P5 (Mullards were actually too warm and mushy). The 6H30's are not for those that crave 'tubey' sound. IMO, they sound like a hybrid design. They have more warmth in the mids than typical SS (not all SS), but they are more dynamic than typical tubes.
They are not interchangeable, due to differences in plate voltages the system has to be designed to use each specific tube.
I hope this was somewhat helpful,
John
They are not interchangeable, due to differences in plate voltages the system has to be designed to use each specific tube.
I hope this was somewhat helpful,
John