Audio Research HD-220 Power AmplifierHD220 Specifications: POWER OUTPUT: 220 watts per channel into 8 ohms from 20Hz to 20kHz. 380 watts per channel into 4 ohms. FREQUENCY RESPONSE: (-3dB points at 1 watt) 0.5Hz to 200 kHz. INPUT S...3995.00

Audio Research HD-220 Power Amplifier [Expired]


no longer for sale

HD220 Specifications: POWER OUTPUT: 220 watts per channel into 8 ohms from 20Hz to 20kHz. 380 watts per channel into 4 ohms. FREQUENCY RESPONSE: (-3dB points at 1 watt) 0.5Hz to 200 kHz. INPUT SENSITIVITY: 4.0V RMS BAL for rated output. (20.8 dB Bal gain into 8 ohms). INPUT IMPEDANCE: 300K ohms Balanced, 150k ohms SE. OUTPUT POLARITY: Non-inverting. Balanced input pin 2+ (IEC-268). OUTPUT REGULATION: Approximately 0.07dB 8 ohm load to open circuit (Damping factor approximately 130). OVERALL NEGATIVE FEEDBACK: None. HUM & NOISE: Less than 0.1mV RMS -112dB below rated output (IHF weighted, input shorted). POWER SUPPLY CAPACITANCE: 200,000 uF. POWER REQUIREMENTS: 105-125VAC 60Hz (210-250VAC 50Hz) 750 watts at rated output (220 WPC 8 ohms) 1200 watts max (380 WPC 4 ohms) 250 watts at “idle.” TUBES REQUIRED: 2 - 6H30 Driver, 2 - 6922 Voltage amp. DIMENSIONS: 19" (48.3 cm) W x 8.75" (22.2 cm) H x 19.5" (49.5 cm) D. Handles extend 1.5" (3.8 cm) forward. WEIGHT: 58.9 lbs. (26.8 kg) Net; 73.8 lbs.
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