Audio Research Reference 2SE Phonostage (low hours)

FREQUENCY RESPONSE
REFERENCE PHONO 2: ± .2dB of RIAA, 10Hz to 60kHz: 3dB points below 0.5Hz and above 300kHz. REFERENCE PHONO 2 SE: ± .2dB of RIAA, 10Hz to 60kHz: 3dB points below 0.3Hz and above 300kHz.
DISTORTION (THD)
REFERENCE PHONO 2: .002% at 1.0V RMS 1kHz BAL output. REFERENCE PHONO 2 SE: Less than .002% at 1.0V RMS 1kHz BAL output.
NOISE & HUM
0.22µV equivalent input noise, IHF weighted, shorted (Low Gain) input (73 dB below 1mV 1kHz input). 0.055µV equivalent input noise (High Gain) (65dB below 0.1mV 1kHz input).
GAIN
Selectable 51 dB (Low), 74 dB (High) at 1 kHz BAL; 45 dB (Low), 68dB (High) at 1 kHz SE. (MC & MM compatible).
INPUT IMPEDANCE
47K ohms and 100pF SE. Additional selectable loads: 1000, 500, 200, 100, 50 ohms and Custom.
OUTPUT IMPEDANCE
200 ohms SE, 400 ohms balanced. Recommended load 50K-100K ohms and 100pF. (10K ohms minimum and 2000pF maximum.)
OUTPUT POLARITY
Non-inverting
MAXIMUM INPUTS
250mV RMS at 1kHz (680 mV RMS at 10kHz).
RATED OUTPUTS
0.5V RMS 10Hz to 20kHz, 100K ohm load (output capability is 80V RMS BAL output at ½% THD at 1kHz, 40V SE.)
POWER SUPPLIES
Electronically-regulated low and high voltage supplies. Line regulation better than .01%.
TUBE COMPLEMENT
(4) 6H30 dual triodes, plus (1 each) 6H30, 6550C in power supply.
POWER REQUIREMENTS
100-135VAC 60Hz (200-270VAC 50/60Hz) 140 watts maximum. 2W standby. Line fuse 5A SLO BLO (T2A SLO BLO 230V).
OTHER
Buttons: Front (6) Power, Input, Gain, Load, RIAA, Mute.
DIMENSIONS
19″ (48 cm) W x 7″ (17.8 cm) H (standard rack panel) x 15½” (39.4 cm) D. Handles extend 1½” (3.8 cm) forward of front panel.
WEIGHT
27 lbs. (12.3 kg) Net; 38 lbs. (17.3 kg) Shipping.