Specifications - Audio Research Reference 750 SEL Manual

Power Output: 750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion
typically 0.5% at 750 watts, below .04% at 1 watt. Approximate actual power available at "clipping" 850
watts (1kHz). (Note that actual power output is dependent upon both line voltage and "condition" i.e.:
if power line has high distortion, maximum power will be affected adversely, although from a listening
standpoint this is not very critical.)
Power Bandwidth: (-3dB points) 15Hz to 150kHz.
Frequency Response: (-3dB points at 1 watt) 1 Hz to 200 kHz.
Input Sensitivity: 4.6V RMS Balanced for rated output (24 dB gain into 8 ohms)
Input Impedance: 200K Ohms Balanced
Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
Output Taps: 16 ohms, 8 ohms, 4 ohms
Output Regulation: Approximately 0.5dB 16 ohm load to open circuit (Damping factor approximately 17).
Overall Negative Feedback: 13dB
Slew Rate: 20 volts/microsecond
Rise Time: 1.5 microseconds
Hum & Noise: Less than 0.2mV RMS – 110dB below rated output (IHF-A weighted, input shorted, 16 ohm
output).
Power Supply Energy Storage: Approximately 1300 joules.
Power Requirements: 105-130VAC 60Hz (260-750VAC 50Hz) 2100 watts at rated output, 2400 watts
maximum, 800 watts at "idle".
Tubes Required: 8 Matched pair KT150 Power Output; 1 6550WE Regulator; 1 6H30 Regulator Amplifier;
1 matched pair KT150 Driver; 1 6H30 follower.
Dimensions:
Width 13.5" (34.3 cm)
Height 23" (58.4 cm)
Depth 20.8" (52.8 cm)
Handles extend 1.5" (3.8 cm) forward and rearward.
Weight: 170 lbs. (77.2 kg) Net; 395 lbs. (180 kg) per pair shipped weight.

Specifications

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