Audio Research REF2SE One of the Most musical phono stage around

Specifications FREQUENCY RESPONSE: ± .2dB of RIAA, 10Hz to 60kHz; 3d B points below 0.3Hz and above 3 00kHz. DISTORTION: Less than .002% at 1.0 V RMS 1kHz output. GAIN: Selectable 51dB (Low), 74dB (High) at1kHz BAL; 45dB (Low), 68dB (High) at1kHz SE. (MC & MM compatible). BUTTONS: Front (6) Power, Input, Gain, Load, RIAA, Mute. Remote adds ‘Hours’ and ‘Display’ . INPUT IMPEDA NCE: 47K ohms and 100pF SE. Selectable loads: 1000, 500, 200, 100, 50 ohms and Custom. PHONO EQUALIZATION: (Selectable) RIAA, Columbia, Decca. POLARITY: Non - Inverting. OUTPUT IMPEDANCE: 200 ohms SE, 400 ohms balanced. Recommended load 50K - 100K ohms and 100pF. (10K ohms minimum and 2000pF maximum.) MAXIMUM INPUTS: 250mV RMS at 1kHz (680 mV RMS at10kHz). RATED OUTPUTS: 0.5V RMS 10Hz to 20kHz, 100K ohm load (output capability is 80V RMS BAL output at 1/2% THD at1kHz, 40V SE.) POWER SUPPLIES: Electronically - regulated low and high voltage supplies. Line regulation better than .01%. NOISE: 0.22uV equivalent input noise, IHF weighted, shorted(Low Gain) input (73 dB below 1mV 1kHz input). 0.055uV equivalent input noise (High Gain) (65dB below 0.1mV 1kHz input). TUBE COMPLEMENT: (4) 6H30 dual triodes, plus (1 each) 6H30, 6550C in power supply. POWER REQUIREMENTS: 100 - 135VAC 60Hz (200 - 270VAC50/60Hz) 140 watts maximum. 2W standby. Line fuse 5A SLO BLO (T2A SLO BLO 230V). DIMENSIONS: 19" (48 cm) W x 7" (17.8 cm) H (standard rack panel) x 15.5" (39.4 cm) D. Handles extend 1.5" (3.8 cm) forward of front panel. WEIGHT: 27 lbs. (12.3 kg) Net; 38 lbs. (17.3 kg) Shipping.