Sure you can bias any amp, I didnt know you were looking at something that required that much work. I was thinking you were looking for plug and play!
If you have the coin Engl makes some nice power amps as well using 5881 tubes, almost a 6L6 but breaks up sooner. I know a few guys that use these and they love em.
Actually, I'm not looking at something that requires that much work, I would prefer not to anyway. My comments are based on what I'm seeing is out there and available, which is pretty much the same. Either way, it looks like a costly proposition.
Soldano amps use 5881 Sovtek tubes in them because they can handle 700 volts across the plate, which surprises me, since I tend to think of Sovtek tubes as weak with a short life span. Maybe I'm wrong in that respect. It seems Mike Soldano has figured out a reliable circuit for them.
I have no experience with the Mesa amps, but I know several of the members here do, so I'm relying heavily on the comments and opinions of how they respond with the ADA preamps from what the users here have to say about them.
Maybe a cheaper option is the marshall 20/20, I have one and these are good amps.
BUT since this is an ADA monster rig you should use a ADA amp I think??
My original plan is for 2 poweramps to drive eight Split-Stacks with. If one amp could deliver a good enough performance, I would probably be good with that.
As far as the ADA amps that I like, my favorite setup is to use the MT100's in mono bridged mode, but they don't last like that, One channel always seems to blow. There were long discussions in the old Forum about that, but no one ever seemed to figure out why that happens, or how to solve that. Besides, using MT100's like that would require 8 of them, and I'd have to put them in a separate rack. Not very practical.
For now, it seems like two B200S, or two MT200's would be my options.
Harley