Audio Research PH-7 Phono Stage Only 3 hours on it!

Mint conditions. Never used this Phono, Only 3 hours on the tubes! This unit was considered ARC's best phono stage in 2007. Research the web for additional favorable reviews.

PH7 Specifications:

FREQUENCY RESPONSE: ±..25dB of RIAA, 10 Hz to 60kHz; 3dB points below 0.7Hz and above 400kHz.

DISTORTION: Less than .005% at .50V RMS 1kHz output.

GAIN: 57.5dB at 1kHz (MC & MM compatible)

PUSH BUTTONS: Power, Mono, Load, Mute

INPUT IMPEDANCE: Selectable 47K, 1000, 500, 200 or100 ohms with 200pF Unbalanced.

OUTPUT IMPEDANCE: 200 ohms Unbalanced. Recommended load 50K-100K ohms and 100 pF. (10K ohms minimum and 2000pF maximum.)

OUTPUT POLARITY: Non-inverting.

MAXIMUM INPUT: 70mV RMS at 1kHz (180mV RMS at 10kHz).

RATED OUTPUTS: .50V RMS 10Hz to 60kHz, 100K ohm load (output capability is 50V RMS output at 1/2% THD at 1kHz).

CONTROLS: Rotary volume selector (104 steps) and rotary input selector.
Push buttons: Power, Monitor, BAL/SE, Proc, Mute. Also remote buttons: Display, Bal L, Bal R, Hours, Invert, Gain.

POWER SUPPLIES: Electronically-regulated low and high voltage supplies. Automatic 50 sec. warm-up/brown-out mute. Line regulation better than .01%.

NOISE: 0.16uV RMS equivalent input noise, IHF weighted, shorted input (70 dB below 1mV 1kHz input).

TUBE COMPLEMENT: (4) 6922/E88CC dual triodes with JFET input. (1) 6H30 dual triode and (1) 5881/6L6WGC dual triode as HV regulators.

POWER REQUIREMENTS:100-135VAC 60Hz (200-270VAC 50/60Hz) 80 watts maximum. Line fuse 3A SLO BLO (1.5A SLO BLO 230V).

DIMENSIONS: 19" (47 cm) W x 5.22"(13.2 cm) H x 12"(30.5 cm) D. Rear chassis fittings extend 0.6" (1.5 cm)