Audio Research PH3 Tube Phono Preamplifier

FREQUENCY RESPONSE
±.15dB of RIAA, 10Hz to 60kHz.
3dB points below 0.5Hz and above 400kHz.

DISTORTION (THD)
Less than .005% at .50V RMS 1kHz output.

NOISE & HUM
0.1µV equivalent input noise, IHF weighted, shorted input (80 dB below 1mV 1kHz input).

GAIN
54dB at 1kHz (MC & MM compatible).

INPUT IMPEDANCE
47K ohms and 90pF Unbalanced.
(Provisions for any value below 47K ohms or added input capacitance for
matching certain magnetic cartridges.)

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

OUTPUT POLARITY
-

MAXIMUM INPUTS
60mV RMS at 1kHz (240 mV RMS at 10kHz)

RATED OUTPUTS
.50V RMS 10Hz to 60kHz, 100K ohm load (output capability is 30V RMS output at 1/2% THD at 1kHz).

POWER SUPPLIES
Electronically-regulated low and high voltage supplies.
Line regulation better than .01%

TUBE COMPLEMENT
(3) 6922/E88CC dual triodes with JFET input.
Solid state power supply.

POWER REQUIREMENTS
100-135VAC 60Hz (200-270VAC 50/60Hz) 28 watts maximum.
Line fuse 0.6A SLO BLO (0.3A SLO BLO 230V).

DIMENSIONS
19" (48 cm) W x 5 ¼" (13.4 cm) H (standard rack panel) x 10 ¼" (26 cm) D.
Handles extend 1½" (3.8 cm) forward of front panel.
Rear chassis fittings extend ¾" (2.2 cm)

WEIGHT
PH3: 10 lbs. (4.5 kg) Net;
19 lbs. (8.6 kg) Shipping.