Fuhlen, OCTAVE, KT120 tube mono power amplifier, "MRE220"

Class A / B model of the extended type pentode push-pull drive that designed on the base

of stereo power amplifier "RE290" and mono power amplifier "MRE130".

Use vacuum tubes, adopted 6SN7 × 1 to the input tube, ECC802JJ × 1 to the driver tube,

KT120 × 4 to the output tube. Equipped with bias current adjustment function of the 10-turn

potentiometer. Use capacitors, 105 degree of LH grade.