[Arny Krueger[_5_]]

"Scott" wrote in message
...

But none of these ABX DBTs that are being touted as scientific proof on
the subject...

Since nobody who really understands science and statistics is claiming that
ABX DBTs are scientific proof of anything, you would appear to be arguing
with yourself.

It is fundamental to science that all of its findings are provisional until
better findings are obtained. Therefore the very concept of some kind of
final "scientific proof" is itself nonsense.

In the one Stereo Review article about their big amplifier challenge one of
the amps was an old Futterman OTL. Strike 1

The amp in question was not an old Futterman OTL but rather it was a modern
amplfiier (in new product production at or near the time of the tests) that
happened to pattern itself somewhat after the origional Futterman OTL tubed
amp. There were many differences. If memory serves it contained solid state
devices, perhaps some in the signal path.

If an underpowered antique OTL isn't being heard as different that should
tell you something about that set of tests.

The amp in question was not an antique and was never operated beyond its
realm of linear operation so it was not underpowered. Strike 2

Your lack of technical understanding of OTL tubed amplifiers seems to
include a lack of appreciation for the fact that an OTL amplifier removes
any output transformer from the signal path, thus removing a large source of
inherent nonlinear distoriton and bandwidth limits.

If there was any kind of a tubed amplifier that would be most likely to
sound like an equally transformerless SS amplifier, it might be one
patterned on the old Futterman design. Strike 3.