Herman- Thanks for the info. I love this amp. So far I am using it primarily to drive HD-600 cans. It is very transparent, fast, smooth, plenty of detail, lots of extension at both ends. I am awaiting a pair of pretty nice monitors to try it out as w/speakers. Probably some of the transparency is the elimination of the need for a pre-amp and extra ICs, since I am using this in my office w/only one source (CD). In fact, I like it so much, I am now looking for a ZH-270, if anyone has one that needs a new home. If you are in the northeast, you are welcome to come for a listen.
Microzotl start-up filament flare?
I have recently purchased a Berning Microzotl which I am using as in my office as a headphone amp and to drive small monitors directly. I have noticed that the filaments in the 12AT7s glow very brightly for about .5 sec immediately after start-up and then settle back to a soft glow and stay that way. Is this normal? I will check with Berning next week, but was curious about it and wanted to know if anyone else has noticed this. TIA. And Happy Holidays.