I don't have the answer to your question, but this was the one displayed at Emo On the Road - Boston, in the summer of 2013:
And that's exactly the look of the amp he's selling, in 180 or 305 watt versions for $7-$8 K per pair at his site, on sale.
Actually, they are 200 and 350 watt versions. And they have XLR inputs now. Much bigger transformers. And the sale price is $6995 with KT-120's and $7495 with KT-150s. Call Walter Leiderman at Underwood HiFi and you might get a better deal.
"The ear is not a microphone, the brain is not a tape recorder, and measurements are limited in describing subjective quality." - Nelson Pass
2 Channel: DC-1, Actively bi-amped custom built planers with Maker Audio G9 Mono Block amps (2 ea), and XPR-1 (2ea) crossed over at 650hz 12 db Linkwitz/Riley Electronic Crossover
Theater: A whole bunch of junk that I haven't been interested in in years. Movies suck....