Absolutely a very rare top class tuner with unprecedented possibilities. Optonica was the high end line from Sharp. These amplifiers are rarely offered. The specifications are beautiful. Absolutely belongs to the top amplifiers from that period. Of course it has a very good phono input and even a preamplifier output and power amplifier input. This is also used when an equaliser is used. There are very few signs of wear on it, except for 4 indentations of feet on top. The display is fully functional and beautiful. The last photo shows the beautiful construction with the cast toroidal transformer. Specifications Power output: 33 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 65kHz Dimensions: 430 x 75 x 382 mm Weight: 8 kg