Up for sale is a highly regarded NEW A-20 in very good working condition. The NEW A-20 is rated at 20 watts/ch and operates in class A bias. I have measured the output on this unit and it puts out 30 W into 8 ohms from 20 Hz to 20 kHz. It runs warm to the touch as expected for a class-A biased amplifier. It can also be bridged into a monoblock amplifier if desired, but I don't know the power rating in bridged mode.
I pulled this out of service earlier this year. I was using it to drive a 72" ribbon from 250 Hz on up. It worked surprisingly well in that application even though the ribbons are 4 ohms and low efficiency. I wanted to get a more dynamic range and upgraded.
Condition is as pictured. Little scratches on some of the heat sink fins and the top of the front fascia. Some scratches on the back, and on the bottom.
Includes power cord, no box, no manual.
It will be double boxed for safe shipping.