Most OTL are not producing enough plate dissipation for a pair of
tubes,Imagine for a pair of 6c33c tube with max.of 60 watts plate
dissipation can produce more than 25 watts class A of power, 3 x of 300b
output in SE.
Its not a matter of plate dissipation, its a matter of output impedance. For some reason people really do want a low power OTL, but what happens is as you decrease the number of power tubes more and more of the total power generated by the output section is absorbed by the output section itself. So if you build a bigger amp its more efficient and the individual power tubes run cooler.
Not trying to change the subject, it just seemed like all the posters
here would be the ones to ask. I would like to get recommendations as to
whether anyone uses an OTL amp with Quad 57's. I bought a pair of these
to try, after all these years, I have never heard a pair so I figured
it was time to try them out. I have read on some other forums that a lot
of the recommended amps mentioned here were if I remember correctly
also recommended for the Quads. Does anyone have any experience with
this pairing?
Quads and OTLs have a history together going clear back to the 1950s. We have a lot of customers that use our amps with ESL57s and ESL63s which are good speakers for OTLs due to a fairly benign impedance curve.
