who makes auto biasing tube amps w/200 wpc

The difference between 200 watts and 100 watts is 3db.....not a lot....call it 150? I don't know how to do logs, but it is sure to be almost unhearable.

Autobias? terrific idea! Why didn't I think of that?

93db speakers MAY be able to use 200 watts if they are in a pretty good sized space and pushed. Running them at say......30 watts continuous with 9db amp headroom? Somebody do the math on that.
The other possible reason is large phase angle loading. In that case, I'd probably want to rethink tubes...

Blindjim I have had 4 tube amps;vtl 225 monoblocks,manley ref 440/200 monoblocks,cary slam 100 mono's and the audiovalve's I currently have.
The vtl and manleys sounded very similiar and they were driving merlin 4b+'s and dunlavy sc3's;controlled bass,midrange that most tube lovers crave and extended highs,the manleys ran 6550c's and the vtl's ran kt88's.
The cary slam 100's are the ones I had the longest;running jjkt88's at 95watts triode;these amps were the best I have owed until now;these amps drove the dunlavy's and the sound was just fantastic and then I got the itch to see what electrostatics were all about and found the cary's to do a very good job but were being taxed and it was noticable;loss of bass control on the panel,the midrange fell apart and the overall sound was degraded;these amps were the first generation on the slam 100's and it was fixed at triode with no ultralinear switch as the newer models had.I traded them in on the audiovalve challangers and have never been happier.Sound is first rate from top to bottom,they seem to control the panels with ease.Build quality is excellant and I have not experienced any problems with these amps since I aquired them.
I have not tried tube rolling on them as I am rookie in this area but have made some inquiries on where to start and what to try.

Rleff

All of that is quite encouraging. Thank you.

Moscode 401HR. 200 wpc + auto biasing. I'm sure you can get one used in your price range.

Dhoff01

thanks ... I had thought about the Moscode initially but wasn't sure... and I like the idea of a hybrid too as those I've heard seem to do better in the bass region than strickly tube amps do.