Wyetech, thoughts comments on amp.

I have a Wyetech Topaz. It is a fabulous amp with the right speakers. As long as your speakers can be driven by 23 watts and has a kind impedence, there isn't much out there that is better. It has great bass power and articulation, and outstanding delineation of instruments and vocals. Unlike other SETs, it is very neutral and natural sounding. Read the TAS review by Scot Markwell, and there are some other comments about it on the internet. I've only heard the Atmosphere M60 Mk2s. They were very good. I'm sure the M1s are very good also. But Atmasphere amps have boo-coo tubes that heat your room and light it up like a nuclear powerplant. The cost of re-tubing must be pretty high.

I've had OTLs in the past. I've always found the in-your-face, crystal clear sound they provide a bit fatiguing after awhile. An exception was the Joule Electra OTL, which is a much more mellow OTL sound. If you like what you are hearing now, stick with it.You probably can't go wrong either way, but I don't think you are going to be able to demo a Wyetech in your system. They are an extremely limited production amplifier (mine is the latest - serial #37 after two years of production). Another consideration would be the Tenor OTLs, if you can find them used. There is (or was) a 15 watter for sale on Audiogon, but I don't think that would drive your speakers. They do make a 75 watt OTL that is supposed to be extremely good. They use fewer tubes than the Atmospheres, and have gotten fabulous reviews.

Try a search here on the WP 6's. Several long threads on amp choices. Don't know you're price range, but the BAT vk75se/150se should be on the list, the Tenors, and maybe a few solid state amps.

What's the rest of your system? digital or analog sources?

If heat and constant biasing is not a problem, then I would stick with the Atmaspheres. I've also owned the Wyetechs and personally(IMHO), I thought they were very honky and nasel in sound. I know I'm going to get blown out for saying this, but it's my experience.The build quality is great on the Wyetechs, but who cares if they don't give you the sound. What your after is both build quality and great sound.I think now that you've heard OTLs you will never be happy with any transformer coupled tube amp. Beleive it or not(from someone who's owned all the amps mentioned and them some)the best amp I've heard recently, is the Aloia. I know solid state, but all solid state(except some McIntosh) is OTL and the inductive power supply on the Aloia does things that no(at any price) other amp can do.And it has all the conviences of solid state, no biasing,low heat,leave on 24 hours(ready to play at a moments notice), no tubes to replace.I've also had many solid state amps before, and the OTLs was the way I was staying. I was convinnced OTL was the answer to all amps, and them someone brought over this little 30 watt solid state amp called Aloia. I have since been scratching my head.Let the flames begin,sorry just calling it like I see(hear)it.

Philefreak:
Perhaps you should clarify which Wyetechs you're talking about. Didn't you own the Onyx amps?

The David Berning ZH270 should be on your list. It has plenty of guts, is zero-hysteresis OTL, will drive lower impedences well without an impededance matcher(transformer) like the Atma-Sphere. Sounds great, and will save you a bundle of cash. There are very few tubes since the ZOTL circuit doesn't use rows of tubes for impedance matching, and the tube life is 10-20 years of normal use. The catch is, that Berning has only about 3 dealers, and mostly works factory direct. So it is hard to find one to audition. Do a search in the archives on Berning ZH270, and you'll find lots of lively discussion and comparisons to some pretty high-dollar amps. The ZH270 is about $4500 new.