The new flagship amplifier, the Reference 750SE features an upgrade from the KT120 to the KT150 output tube, as well as a number of active and passive parts changes. The sonic improvements are dramatic.
About this product
Fantastic condition pair of trade-in, used Audio Research REFERENCE 750SE Monoblock Amplifiers with Fans. Amps come in Audio Research boxes with manual and power cords.
Amps are rated 8/10 for minor cosmetic wear consistent with age and use.
This unit does not come with warranty.
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 TAPS: 4, 8, 16 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: 13.5″ (34.3 cm) W x 23″ (58.4 cm) H x 20.8″ (52.8 cm) D. Handles extend 1.5″ (3.8 cm) forward and rearward.
WEIGHT: 170 lbs each, net. 395 lbs per pair shipped weight
Please call 734.662.3595 and ask for Richard if you have any questions about this product. We make every effort to update our ads quickly when inventory fluctuates, but we encourage you to call and check product availability, as we are also a brick and mortar store.
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