I ran them with a Bryston 4B SST, and then a 14B SST. The 4B SST's protection circuitry kept shutting down after playing the system at high volumes for 45 minutes to an hour. That's why I bought the 14B SST, which seemed to work well.
The 7B do require a lot of juice.
I'm not sure I'd recommend tubes for them. Maybe some 7B owners who use tubes will have some input.
The 7B do require a lot of juice.
I'm not sure I'd recommend tubes for them. Maybe some 7B owners who use tubes will have some input.

