Audio Research PH9 Phono Stage

PH9 provides class leading phono preamplification for the majority of cartridge and turntable combinations. A trio of 6H30 vacuum tubes form the core of a simple and clear signal path. A classic Audio Research design, the PH9 revels in the vibrance and vitality with which tube gear excels, yet neutrally portrays the subtlest shadings in cartridge and tone-arm selections with transparency. Five impedance settings Five different impedance settings allow for cartridge loading, which can be changed on the fly with the included metal remote. Cartridge impedance, tube hours, auto shutdown, and other features are included in the menu system.       Since 1970, High Definition has been more than our trademark; it has been our guiding principle for all products. PH9 continues this passion and philosophy, offering the listener stunning playback, great value, and unparalleled long-term support. TECHNICAL SPECIFICATIONS Frequency Response ±.2 dB of RIAA, 5 Hz to 20kHz; 1 dB points below 0.3Hz and above 80 kHz Distortion Less than .015% at 3V RMS 1kHz output Gain 58 dB at 1 kHz Input Impedance Selectable loads: 47k, 1000, 500, 200, 100 Ohms Output Impedance 200 ohms. Recommended load 50k-100k Ohms and 100 pF. (10k Ohms minimum and 2000 pF maximum). Output Polarity Non-inverting Maximum Input 80 mV RMS at 1kHz Rated Outputs 0.5V RMS 10 Hz to 60 kHz, into 100K ohm load (maximum balanced output capability is 0.46V RMS at less than 0.5% THD at 1kHz) Controls 6 Push Buttons:   Power, Menu, Option, Enter, Input, Mute Power Supplies Electronically regulated low and high voltage supplies.   Automatic 2 minute warm-up/brown-out mute. Line regulation better than .01% Noise 77 dB, shorted inputs Tube Complement (3)-6H30P dual triodes, plus (1 each) 6550WE and 6H30P in power supply Power Requirements 100-125VAC 60Hz (200-250VAC 50/60Hz) 120 watts maximum. Standby: 2 watts Dimensions Width: 19” (48 cm) Height: 6.5” (13.7 cm) Depth: 13.7” (34.8 cm) Handles extend 1.6” (4 cm) forward of the front panel Weight: 15.4 lbs. (7 kg) Net; 23.5 lbs. (10.7 kg) Shipping