I think I read the input impedance of the new Rogue amps is 200K ohms, which would make it most well suited for use with most any tube or ss pre-amp.
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I have found that the combination of a Modwright tubed pre-amp and Wyred 4 Sound Class D monoblocks gives me the best sound for my money so far. I would have to spend considerably more money to get a top quality SS or tubed monoblock. I trust that Rogue knows their stuff and that the pre-amp and amp will work well together. The Class D amps are easier to maintain and should last a long time and you can try different tubes in the pre-amp section to taste. It may be the integrated of the future.
"Not that science has anything to do with it."
Wouldn't science say that lots of high gain tubes in the output stage of a power amp are more problematic in general from a maintenance and cost perspective, both of which affect the end user?
Making the benefits of tube sound more affordable and usable for the masses seems to be the profound design goal here. On paper at least, I'd say mission accomplished!
My local dealer sells Rogue and the gear there always sounds great. I'm very much looking forward to hearing these sometime soon. They would seem to fit very nicely into either of my systems down the road if ever needed.
Is Rogue the first to do this?
Can't think of any other straight power amps I know of but this approach makes so much sense with so many speakers out there from what I can see that I'm surprised if no one else has done this yet.
I just got done preaching the gospel of high damping factor class D for certain kinds of speakers on another thread. The article referenced above coincidentally plays right into that theme.