Audio Research PH9
The PH9 phono preamplifier is a great pairing with most cartridge and turntable combinations. A trio of 6H30 vacuum tubes are at the core of a simple and clear signal path to provide the most transparent preamplification possible.
PRODUCT DETAILS
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- 55 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.
