This is a listing for two pieces of board.
This is the circuit based on the Pioneer legendary M22 class A amplifier.
Background : M22 belongs to Pioneers series 20 amplifiers. It was a showpiece of Pioneer to illustrate the design and manufacturing quality. Built as a tank, M22 was widely acclaimed as one of the best class A power amplifier in solid state domain, regardless of cost.
Being a class A amplifier, M22 was magical in the lucid midrange that excelled a lot of class A counterparts.
In this incarnation, we used the readily available transistors in the market though strictly following the original design, ensuring each stage is biased to the same condition.
Specification :
Output power : 30Wrms 8 ohm non-clipping@ +/-28Vdc input
Frequency response : 5Hz to 120KHz +/-1dB
Supply voltage : +/-36Vdc 50mA input stage , +/-28Vdc 4A output stage
Board dimension : 201mm x 89mm x 1.6mm( board thickness)
We provide schematic/part list and adjustment guide to buyers.
The finished board picture is for reference. This listing is for one piece of bare amplifier board.
