OTL amplifiers

That tubegroover fellow is grooving right! I agree with his post 100%

Clueless and Tubegroover, nice posts! Thanks!
P.S. Ever had a Futterman blow up on you ?
Those were the days...today, as TG has noted, the amps are much more reliable.
Cheers,

OTL bests with ear-speakers. There I see no compromise whatsoever.

Detlof. You had a Futterman blow on you?

I am reading through the Rosenberg book (from the Sherod thread) on Tube Electronics the last part of which is a long presentation (ad for?) Futterman amps. There was a recent thread here re warranties and everyone was impressed with Bryston's 20 years. That's small change.

The good news is that Rosenberg's book clearly states that the Futterman amps carry a "lifetime warranty!"

The bad news is I'm not sure if they meant your life of Harvey's.

You'll enjoy the book. It has a picture of the pressure cooker Futterman used to prepare the varnish to varnish his power transformers which he then "put on the window sill to cool."

Times have changed.

Sincerely
I remain,

OTL's are usually more expensive, have many tubes - expensive tubes (high current triodes), consume a lot of power, may not perform the same with different speakers, and may not even work with some speakers. Those are, in very general terms without a specific make, the downsides (inconveniences, IMO). The huge advantage is the absence of the output tranformer which means the total harmonic distortion is almost non-existent. That's what gives 'em that incredible sound.

I disagree with tubegroover about a disadvantage being that they run hot. That' a characteristic of Class A operation, not the OTL topology.