The Audio Research Ref Phono is a high-end phono stage that has been carefully crafted to deliver reference-level performance for audiophiles who are serious about getting the most out of their vinyl playback. As part of Audio Research's revered Reference Series, this phono preamp offers a combination of tube warmth, incredible detail, and dynamic range, making it a true benchmark in analog sound reproduction. For anyone looking to hear their vinyl records as close to the master tape as possible, the Reference Phono delivers exceptional performance that will reveal every nuance, depth, and texture from your collection.
Production
2000
Condition
9.5/10
Serial No.
79201611
Orig. MSRP
$6,495
Restoration
- Replaced 5 x 6922 tubes
- Verified both high and low inputs
Factory Specs
Frequency response
± .15dB of RIAA, 10Hz to 60kHz; 3dB points below 1.0Hz and above 250kHz
Distortion (THD)
.005% at 0.5V RMS 1kHz output
Noise & hum
0.56µV equivalent input noise, IHF weighted, shorted (Low Gain) input (65 dB below 1mV 1kHz input). 0.055µV equivalent input noise (High Gain) (65dB below 0.1mV 1kHz input)
Gain
Selectable 48dB (Low), 69dB (High) at 1kHz (MC & MM compatible)
Input impedance
47K ohms and 180pF Unbalanced (Low Gain), 280 ohms Unbalanced (High Gain). (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.)
Maximum inputs
100mV RMS at 1kHz (240 mV RMS at 10kHz)
Rated outputs
0.5V 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
(11) 6922/E88CC dual triode, plus (1 each) 5AR4, 6L6GC, 6922 in power supply
Power requirements
100-135VAC 60Hz (200-270VAC 50/60Hz) 120 watts maximum. 50W standby. Line fuse 3A SLO BLO (T2A SLO BLO 230V)
Other
Switches: Front (4) Power, Standby, Mono, Mute. Rear (1) Gain
Dimensions
19" (48 cm) W x 7" (17.8 cm) H (standard rack panel) x 15½" (39.4 cm) D. Handles extend 1½" (3.8 cm) forward of front panel
Weight
28 lbs. (12.7 kg) Net; 42 lbs. (19.1 kg) Shipping.
The History of Audio Research
Audio Research Corporation, affectionately known to fans as ARC, was founded by William Z. Johnson, who began designing custom audio electronics in the early 1950’s and who also operated a specialty audio retail store until the mid-1960’s. Johnson’s efforts almost single-handedly revived vacuum-tube designs at a time...
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Liner Notes
There is good news for analog music lovers worldwide who have been waiting patiently for a Reference Series phono preamplification stage to accompany their Audio Research Reference 1 or 2 line stage. The new Audio Research Reference Phono stage is now available from authorized retailers.
The REF Phono stage is an all-vacuum-tube design. Of the 14-tube total, eleven 6922 twin triodes are used in a unique single-ended signal path. High voltage rectification utilizes a 5AR4 / GZ34, while regulation is accomplished using a 6550C controlled by another 6922.
For the analog music purist, this is the phono stage to make everyone happy! Using chassis construction and dimensions identical to the REF1 and REF2 line stage preamplifiers, the REF Phono makes a perfect companion piece, visually and sonically, to other Audio Research models.
A choice from two sets of inputs -- one (+69 dB gain) for low-output moving coils, the other (+48 dB gain) for high-output moving coils and moving magnet cartridges -- is selected by a rear panel switch. The higher-gain path incorporates a high-purity, multiple-shielded step-up transformer to provide the additional gain. Used with a 12 dB or 18 dB line stage, the REF Phono supplies sufficient gain for virtually any cartridge available.
Cartridge impedance matching is accomplished by the best sonic means available: high-purity resistors soldered to terminal posts inside the chassis. While the REF Phono will normally be factory-set at 47K ohms, separate customer values for both sets of inputs are available at time of order at no extra charge. A resistor kit with special solder is also supplied with each unit.
The REF phono includes additional popular features. The 14-gauge line cord is detachable via the IEC-standard three-pin socket at the rear, allowing custom A.C. cords to be used as desired. Standard front-panel toggle switch controls include Power / On, Operate / Standby, Stereo / Mono and Operate / Mute. The Standby mode, which keeps current running through audio tube heater filaments, will be particularly welcome to those demanding maximum performance without the usual warm-up curve.
With all the relevant features a phono lover needs, yet without the extraneous bells and whistles that would raise cost and inhibit the best sonic performance, the REF Phono is a true thoroughbred in every sense: resolution, frequency response, soundstage focus and musical dynamics are simply beyond what you have experienced before from any phono stage. You will be amazed at how records you haven't heard in years leap to life and become emotionally and musically meaningful again.
Stock No.
8829856186589
