Fully Guarenteed. Used Preamp & Amplifier(Integrated Amplifier) in VG+ condition. Power Output: ELECTRICAL SPECIFICATIONS 90 watts RMS continuous, 45 watts per channel operating simultaneously into 4 ohm or 8 ohm loads. 60 watts RMS continuous, 30 watts per channel operating simultaneously into 16 ohm loads. Harmonic Distortion: Less than 0.25% at rated power output from 20Hz to 20,000Hz with both channels operating. Intermodulation Distortion: Less than 0.25% for any combination of frequencies from 2QHz to 20,000Hz if instantaneous peak power is 90 watts per channel or less into 4 or 8 ohm loads and 60 watts per channel or less into 16 ohm loads with both channels operating. Frequency Range: At rated output both channels: ±0.5dB 20Hz through 20,000Hz. Output Impedance: 4 ohm, 8 ohm, 16 ohm. No impedance switching required. Internal Impedance/Damping: Less than .04 ohms; damping factor greater than 100. Input Sensitivity And Impedance: Auxiliary, Tape, Tuner, and Tape Monitor: 300mV, 250K ohms. Phono 1 and Phono 2: 2mV, 47,000 ohms. Tape Head: 2mV, 1/2 megohm. Hum And Noise: High Level Inputs: 75dB below rated output. Low Level Inputs: 70dB below 10mV input. Power Amplifier: 90dB below rated output. Tape Output: 300mV at rated sensitivity, 1.4 volts with 10mV at phono input. Left Plus Right Output: Adjustable 0 to 6 volts from generator impedance of less than 5,000 ohms. Bass Controls: +18dB at 20Hz. Treble Controls: +l8dB at 20,000Hz. HF Filter: Flat, or 5,000Hz cutoff. LP Filter: Plat, or 50Hz cutoff. Power Requirements; 117 volts AC, 50-60Hz, 70 watts at zero signal output, 200 watts at rated output.