Which high power SET

Ait, have measured the bandwidth of these behemoths?

This is an amazingly interesting subject. I really appreciate the responses, technical explainations and detail. Very interesting indeed

Thanks all

For me, #1 priority is amp's ability to drive speaker sufficiently. If not, SQ will suffer whether low or high listening levels from my experience.

Could not agree more.

Atmasphere,

Small signal bandwidth is 7Hz - 66kHz, -3dB; the OPT is of course the limiting factor and those are the actual test results provided by Monolith Magnetics. When I checked the amp with a .05V signal using TrueRTA on my laptop, which only measures from 10Hz -20kHz, it was less than 3dB down at 10Hz, and still pretty much flat at 20kHz. At full power, saturation occurs at 32Hz; I can honestly say that I don't notice any frequency limitations soundwise even at very loud volumes. I had an old friend visiting for the past weekend and we listened into the wee hours to everything from Sonny Rollins to Black Sabbath, and it all sounded great...when we cranked up Yello the walls and floor were shaking from the subsonics.

That is quite impressive to get that sort of bandwidth out of an SET of that sort of power! Do you know the configuration- by any chance is it a parafeed circuit?