Is there any 50W 300B SET monoblock out there?

Al,
You cited your VAC 70/70 amp as an example of a near max operating point design using the 300b in push pull. My amp's builder purposely chose conservative OP parameters for long tube life and sound quality despite it being pure class A bias. So it just makes me wonder which approach puts the tube under more stress in daily use.Just curious about these things.
Charles,

Noted Charles. Thanks.

F1a, Sounds like a real engineer otherwise, Roger will be busy marketing his product like any other businessman.

Hi Charles,

As a further point of info about the VAC Renaissance amps, all of them are described in their respective manuals as being Class A.

Best regards,
-- Al

Larryi said:

In short, avoid the trap of only looking at certain tube types and topologies.

You are in good company. It was Ralph Waldo Emerson who said "consistency is the hobgoblin of little minds." It's kind of like buying from specs. All designs require tradeoffs. If the designer makes the type of tradeoffs that align w your aural priorities and implements the design well, you'll probably like it. If not, it does not matter which tube or which circuit type he or she uses. Of course, the amps operating parameters must match up well w your speakers.

The issue with running any SET at this output is distortion. To put it another way, you never want to run a 300B at even 8 watts.