Beautiful set, fully functional, comes with original manual. Description from the web: The AU-505 is a solid state performer that belongs at the head of its class. No other integrated amplifier in its class can touch Sansui's AU-505 for tonal quality, versatility, ease of operation and economy. Offering luxurious performance at a modest cost, it comes across as the best buy in its price range. Designed in the finest tradition of Sansui's prestigious AU series amplifiers, it delivers performance previously unheard of in a compact unit. Specifications AU-505: - Power output: 12 watts per channel into 8Ω(stereo) - Frequency response: 20Hz to 60kHz - Total harmonic distortion: 0.5% - Damping factor: 50 - Input sensitivity: 4mV(mic), 3mV(MM), 200mV(line) - Signal to noise ratio: 70dB(mic), 70dB(MM), 75dB(line) - Output: 200mV(line), 30mV(DIN) - Speaker load impedance: 4Ω to 16Ω - Semiconductors: 23x transistors, 2x diodes - Dimensions: 407x115x278mm Specifications TU-505: - Type: Mono/Stereo Tuner - Tuning Bands: FM, MW - Tuning Scale: Analogue - FM Tuning Range: 88 to 108 MHz - MW Tuning Range: 535 to 1605 kHz - Sensitivity: 2.5uV(FM) - Signal to Noise Ratio: 65dB(FM) - Distortion: 0.8%(FM) - Selectivity: 50dB(FM) - Frequency response: 30Hz to 15kHz(FM) - Output: 1000mV - Semiconductors: 27x transistors, 1 xFET, 19x diodes, 1x IC - Dimensions: 115x407x278mm