FS: Audio Research REFERENCE 75 amplifier

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Want to sell
Used Excellent Condition 8-9 / 10
I'm selling my ARC REF75 amp (not SE version), asking $4250 (+ shipping).

I am the original owner. The amp has KT150 tubes with ~1700 hours on them, and the original KT120 tubes (which have only ~100 hours on them.) I don't remember exactly the hours when I replaced the 6H30 tubes, but one was acting up around 500 hour mark and I replaced them both. Cosmetically the amp is perfect. Includes original boxes.

I used the REF75 to drive a pair of Wilson Alexia (v1) speakers, and the combination made wonderful music. There are abundant reviews of this great amplifier. The SE version upgrade from ARC included a new set of KT150 tubes and some resistor changes on the circuit board, by far the most audible differences are attributable to the KT150 tubes.

One of ARC's finest stereo amps, a classic to be sure! Don't let the modest 75w/channel fool you.

I can provide more photos. (The cat was never inclined to sleep atop the amp... usually only visited the music room for a few hugs then he was out!)

For Sale: Amplifers: Integrated, Power and pre-amplifiers
Power output 75 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 75 watts, below 0.05% at 1 watt.
Approximate actual power available at ‘clipping’ 76 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) 7Hz to 60kHz.
Frequency response (-3dB points at 1 watt) 0.7Hz to 75 kHz.
Input sensitivity 1.4V RMS BAL for rated output. (25 dB Bal gain into 8 ohms.)
Input impedance 300K ohms Balanced.
Output taps 8 ohms, 4 ohms.
Output regulation Approximately 1.0dB 8 ohm load to open circuit.
Overall negative feedback 15dB
Damping factor Approximately 8
DistortionSlew rate 10 volts/microsecond
Rise time 4.0 microseconds
Hum & noise Less than 0.06mV RMS – 112dB below rated output (IHF weighted, input shorted).
Power supply energy storage Approximately 520 joules
Power requirements 105-125VAC 60Hz (210-250VAC 50Hz) 410 watts at rated output, 500 watts maximum, 230 watts idle.
Tube complement (2) Matched pairs KT120 – Power Output; (2) 6H30 Driver.
Other Output polarity: Non-inverting. Balanced input pin 2+ (IEC-268).
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 47 lbs. (21.3 kg) Net; 63 lbs. (28.6 kg) Shipping.


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