The 22RH521 is the deluxe integrated amplifier from the so-called "Fisheye" series. With a power output of 2x 30 watts, it was quite powerful for its time. Tuner, Aux, Tape, and Phono connections are available via DIN connectors. Three-way tone control, loudness, and rumble and scratch filters allow for optimal sound reproduction at all times. Two pairs of speakers can be connected independently or used in a stereo-4 configuration. It's a class A amplifier so it runs hot normally, but I pulled the idle current down for a longer life and shorter energy bill ;-) All lamps are new. Headphone socket resoldered. Contacts cleaned Set to 240V Including Din adapters on the pictures Some signs of use here and there. Power output: 30 watts per channel into 4Ω (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 1% Damping factor: 20 Input sensitivity: 1mV (mic), 2mV (MM), 100mV (DIN) Output: 250mV (DIN) Speaker load impedance: 4Ω to 16Ω Dimensions: 470 x 117 x 280mm Year of manufacture: 1972 #bestofmusiccf Carefully insured shipped