A transformer less (output stage) tube amp

[3db]

I thought this was kinda neat.

http://www.ultraaudio.com/index.php?option=com_content&view=article&id=97:atma-sphere-music-amplifier-m-60-mk31-mono-amplifiers&catid=37:full-length-reviews&Itemid=2

 

[Swerd]

So they omit the expensive power output transformers, and charge $6950 for that .

I wonder what else has been left out.

 

[jliedeka]

Ralph Karsten of Atma-Sphere makes what are probably the best OTL tube amps. One trade off is a pretty high output impedance. I know a guy that runs Atma-Sphere gear, it sounds fine and is well engineered for what it is.

Jim

 

[mtrycrafts]

Ralph Karsten of Atma-Sphere makes what are probably the best OTL tube amps. One trade off is a pretty high output impedance. I know a guy that runs Atma-Sphere gear, it sounds fine and is well engineered for what it is.

Jim

How high is 'pretty high?'
If it runs into Ohms, the FR response will be that of the speaker's FR horrible.

 

[ski2xblack]

How high is 'pretty high?'
If it runs into Ohms, the FR response will be that of the speaker's FR horrible.

Maybe it would work for a single driver/high impedance 'full range' speaker, something like a Lowther. That seems to be the intended use for such an amp.

The price, however, is absurd. You could put together an entire, excellent performing HT system for that price.