tvc vs avc


from a practical standpoint, what is the difference between a transformer vs autoformer based passive volume control? Bent Audio has moved to Slagle autoformers to replace the unavailable tx 103 S&B transformers, and apparently thinks they work at least as well.
128x128lloydc
Has the passive pre hysteria gone away? Are we all back to our glowing tube preamps?
Well for what it is worth I bought a Berning Micro ZOTL to use as a headphone amp. As luck would have it the one I bought could also be used as a line stage preamp, as well as a 1 watt amp.

I've been using it as a preamp for a month or so now, alternating between my other passive preamps. I still prefer passives and will be getting another one that is balanced, but this Berning has really made a nice difference in my system.

I hope to be getting my custom EL-84 amp this week and will be setting up a second system with the Berning and a pair of Tonian Lab TL-D1 speakers I just purchased. Source will be a Kenwood KT-8300 analog FM Tuner to start, then a computer audio set up when I get around to acquiring the components.
Correct, I love the RM-10 and just saw one pop up here. Was very tempted. This amp was built by Audiogon member Dertubemeister.