OTL amplifiers

Detlof, I'm going all nostalgic! I still have a pair of Mark Lev IC's.

Great stuff...
Futtermans driving Quad 63's (no protection circuit, of course), blowing up on me on a Saturday AFTERNOON...
There was lots of suspense then with the F's: are they biased? (never), will they play? (that's the exciting part).

Back to the question. Can't give tech & other details well covered above.
So, subjectively, OTL's offer an immediacy in the sound and, often, musicality -- I don't mean "tube warmth" (even order, benign distortion). Good microdynamics, giving these amps the "fast" label.

On the other hand, they're picky about the load they can drive, they're expensive and, until recently, not very reliable.

Interestingly enough Detlof, Harvey's "wretchedly excessive" Futterman's are still being used by someone I know to good effect (last time I spoke with him) with nary a problem on a pair of Magenapan Tympani 4"s. I suppose he is one of the lucky ones or maybe this particular *Child* of Harvey has an intrinsically sweeter personality or received more attention during the formative years?

Tubegroover, Harvey DID have his inspired moments, which this "child" must have sprung out of. I alas, was not that lucky. By the way, I would imagine that this combination, you've mentioned, must sound absolutely heavenly.....

Thank you Detlof, I have no plans or desire to replace ANY of my "sources".

Hi!
(Some)OTL amps are amongh the best sounding amps on the planet. They mostly are very expensive but their performance justifies the investment. As Wellfed pointed ZERO Autoformers are the solution (except for the heat dissipance). And not only for OTL designs! You should check the Paul Speltz Website and read/learn about them. After a month (or so) of extensive use i became a believer. They are my next "investment"!
Cheers!