Audio Research Reference 10

We have an Audio Research Reference 10 Preamplifier for sale in excellent condition. Includes full tube compliment and accessories. Includes original boxes. Roughly 2500 hours on the tubes.
Manufacturer Details:

TECHNICAL SPECIFICATION 
  FREQUENCY RESPONSE
+0 -3dB 0.1Hz to 200kHz at rated output. (BALANCED, 200k ohms load.)

DISTORTION
Less than .006% at 2V RMS Balanced output. 

GAIN
Main output (SE or BAL input)12dB Balanced output, 6dB Single Ended output. Tape output: 0dB. (Processor input: 0dB Balanced)

INPUT IMPEDANCE
120K ohms Balanced, 60K ohms SE, Inputs (7): 1, 2, 3, 4, 5, 6, PROCESSOR. (XLR and RCA connectors).

OUTPUT IMPEDANCE
600 ohms Balanced, 300 ohms SE main (2), 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 tape (XLR and RCA connectors).

OUTPUT POLARITY
Non inverting.

MAXIMUM INPUT
20V RMS maximum Balanced, (10V RMS SE).

RATED OUTPUTS
2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 30V RMS at less than 0.5% THD at 1kHz).

CROSSTALK
-80dB or better at 1kHz.

CONTROLS
Volume (104 steps). Push Buttons: Power, Mute, Interactive Touch Panel. Rear RS-232 control and IR input.

POWER SUPPLIES
Electronically regulated low and high voltage supplies. Automatic 40 sec. warm-up/brown-out mute. Line regulation better than .01%.

NOISE
1.7uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (109dB below 2V RMS output.) 

TUBE COMPLEMENT
(8)-6H30P dual triodes, plus (2 each) 6550C and 6H30P in power supply.