Audio Research ph9 Phono Preamplifier

Electrical Disclaimer Further Information

Current model with RRP of $20,995

In Excellent condition. Purchased in June 24 from Class A audio locally and this is a local delivered unit with invoice included showing purchase $9,227

Comes with Box, remote and accessories box included.

Has been Professionally tested by local Audio Research Service agent via Carlton Audio Visual, to make sure in perfect working order. As part of service been fully tested including all valves checked on valve tester and main power supply replaced to make sure as good as new. Invoice and details of service included at total cost of $2,860. Service completed late October 2025 and has had pretty light use from me since.

This is a phenomenal top end unit, capable of lovely inky black noise floor and is highly musical across a broad range of music.

MM/MC Valve Phono Stage.

Reviews:

https://www.carltonaudiovisual.com.au/audio-research-ph9.html

https://www.absolutesounds.com/pdf/main/press/HFN_1216_PH9_4web.pdf

https://reviewary.com/audio-research-ph9-review/

https://www.thespeakershacks.co.uk/2019/09/audio-research-ph9-phono-stage-review.html

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. 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.

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.