3.5 watts per channel into 8 ohms
10 Hz - 20 kHz +/- <1 dB
17.75” w x 10.25 d x 7” h
The first Single Ended Triode amp I ever built was a 2A3. It seemed like a good entry into SET but I saw it as just that. In the years since I have built, owned and auditioned all of the popular output tubes and topologies: 300B, 211, 845, 45, 811 tubes running in single ended, push pull, parallel, etc. But I always come back to the trusty 2A3. For me, it has plenty of power and a great tonal balance.
I developed this amplifier in Japan with an associate of Isamu Asano. By now I have had a great deal of experience with his designs. This amp is a grafting together of a few different designs of Asano, taking my favorite aspects of each circuit.