Why no threads on OTL amps?

Kris: Your statement of "The Berning in my opinion bested the Tenors in every way. Speed, clarity, bass, and of course that magical otl midrange", is quite a reach considering you were listening to two entirely different systems. That is like listening to a system in Montreal and saying did you hear how good those power cords were? It just is not a real valid statement.

Since I have not heard the Berning amps in my reference system, I will not make any statements as to whether they are good or bad. It would be impossible for me to do so with a clear conscience.

The Tenor amplifiers are the finest amplifiers I have ever heard. Nothing I have heard is even close and that is why I took on the line. The Tenor's can handle impedance swings as well as any OTL. What they do not tolerate is what any 75 watt amplifier would have a problem with, inefficient speakers. I have had them on 86 db Eggleston's and they do great within a reasonable limit. If you are looking to drive an 80-86db speaker at over 100db, these amplifiers are not for you. I know at least two people driving Watt Puppy 6's with a pair of Tenor 75's and they could not be happier. The 6's are a 4 ohm speaker that drops to about 2.

Twl: Your statement of "I'll bet it will squash the Tenor amps flatter than a pancake" is quite funny and I will be happy to take that bet anytime you want. How much money you have? :)

Twl: The comment you made has no foundation on fact. You heard two totally different systems with all different components and made a statement about the amplifiers. It is improper and highly incorrect (maybe subjective). I do not need to recuse myself because I do not feel I am improperly participating.

I agree with your concerns about the audio industry and feel as do you. I do not need to sell anything or hype anything just for the sake of making a buck. I like music and what gets me closer to the live experience. I enjoy helping others in that search as well. If it is profitable, at times, great, if not, great too. I think most people I deal with respect the fact that I have a decent ear and speak of what I know and have experienced, not what makes me money.

You seem to be a straight shooter and talk passionately. I respect that and look forward to your future posts.

Best Regards,

Jonathan

Thorty40: This was made clear back when they were introduced. While it is a brilliant design, it is not an OTL. It is a transformer based amplifier that is biased by a high speed oscillator to reduce hysteresis effect of the transformer.

An output transformerless amplifier does not have a transformer between the tubes and the speakers. The David Berning amplifier has one after the tubes. Ask to see the schematics published in the patent application. In your own statement, you aver:

"Ok, the RF re-mapping occurs through the use of a tiny RF transformer at a carrier freq. of 250kHz."

The transformer you speaker of, is in between the tubes and the speaker leads. Hence, it is in no way an OTL.

To reiterate, it is a brilliant design and while having the ability to drive impedance challenged speakers, if put head to head with a proper OTL on a stable load, you might be surprised at which one sounds better. Again, I want to make it clear that if I had a limited budget and a tough load to drive, I would give the Berning amps real consideration.