Why no threads on OTL amps?

Kenl,
I have a pair of Avantegarde Duos. I found that I needed the integrated subwoofer to really enjoy all types of music. I didn't like the single driver(full range) speakers--no frequency extremes tho they do midrange very well. As to the amps, I did compare the two. The 270 sounded great but in comparison to the 811 was more OTL-like e.g. faster and slightly harder sounding. The 811 had slightly more midrange bloom but most importantly for me was that I started listening to the music and forgetting about audiophile sonic attributes like soundstaging,speed,
detail,etc. With the 811 the speakers completely disappeared. Hope this helps.

I also own a Berning amp. I used to be a solid state kind of guy until having an epiphany regarding OTL tube amps. I listened to an Atmosphere amp and was blown away. I started researching OTL amps and became interested in Berning amps because of their novel technology. After listening to ZH270, I bought it. I recently changed to horn speakers and didn't need the power of the 270. So I sold it and purchased the 811 ZOTL. It has all the attributes of an OTL amp; clarity,speed,soundstaging, along with the SET midrange magic. I prefered the sound of the 811 over the 270. I think it has something to do with it being Class A with no negative feedback and single ended (unlike the 270).