At the risk of re-igniting the long-running debate about David Berning's designs, I would say in response to Spectron that the issues of heat and weight and difficult to drive speakers do not apply to David's amps, certainly not to the extent they do to other OTL's. I know someone with Joule 160's, and standing over them when they are fully warmed up is a good way to sweat off a few pounds in a hurry. In contrast, I can put my hand on the grill right above the power tubes in my Quad Z's and leave it there as long as I want, even when they are fully warmed up. And I have had preamps that weighed about as much as the Quad Z monoblocks.
Thought on OTL tube amps
Just curious....how do these sound/perform compared to tube amps with transformers? Why do you prefer one or the other? Any particular brands of OTL amps you would recommend listening to? You can see my system on my tag here...listen mostly to rock and roll with a smattering of jazz and a bit of classical once in a while. The next stop on my amplifier adventure is an OTL model, and I have no intention of trading it for either SET I currently have, as I'm very happy with both. One of the ways I enjoy experimenting with different "sound" is by switching up the amps. Just trying to solicit some opinions, of which I know there are many strong ones here at A-Gon. Thanks in advance!