Audio ResearchPH3 MM Tube Phono PreamplifierusedAudio Research PH3 MM Tube Phono Preamplifier; PH-3; Moving Magnet (28442)Product: Audio Research PH3 MM Tube Phono Preamplifier; PH-3; Moving MagnetProduct SKU: 28442Serial Number: 46481009Voltage: 120VCosmetic Description: 8/10 Excellent condition with minimal visible ...1078.00

Audio Research PH3 MM Tube Phono Preamplifier; PH-3; Moving Magnet (28442) [Expired]

no longer for sale

Product: Audio Research PH3 MM Tube Phono Preamplifier; PH-3; Moving Magnet

Product SKU: 28442

Serial Number: 46481009

Voltage: 120V

Cosmetic Description: 8/10 Excellent condition with minimal visible cosmetic wear including light scratch marks around the screw holes in the top plate.This unit has been modified to have a 3 prong IEC AC inlet installed. This item does show a few blemishes but is attractive overall and has been well cared for.

What is Included: Preamplifier, Manual, Three Sovtek 6922 tubes, Power cable, Factory packaging

Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.

Age: Unknown

# of Owners: Unknown

Tobacco Exposure: No

Service History: None

MSRP: $1495

Other Notes: This item has been modified to have an IEC AC inlet for a removable power cable, rather than the original hard-wired power cable.

Total gain of the PH3 is 54 dB (non-adjustable). Used with typical line preamplifiers having 12 to 18 dB of gain, the PH3 is suitable for phono cartridges having .25 mV output or higher. Input impedance is factory-set at 47K ohms, and input capacitance at 90 pF. For optimal matching to moving-coil and moving-magnet phono cartridges, both input impedance and input capacitance may be adjusted via simple resistor and capacitor changes. (resistors sold separately)

"The PH3 is a phono preamplification stage intended for use with an active line-level stereo preamplifier. Fully single-ended from input to output, the PH3 uses a combination of J-FET input stage technology (for low inherent circuit noise) and class A operation vacuum-tube gain via three 6922 twin triodes."

Product Specifications


Reviews:  User Reviews

Shipping: Cost to ship this item within the contiguous United States is a flat rate of $37- including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Items with factory packaging will be double boxed. When factory packaging not available re-usable shipping box with custom injected-foam mold will be used. (for all items over 10 lbs). Note that all items valued over $750 will require a signature upon delivery.


member since August 2013

TMR Audio  Verified Dealer

Last 12 months
Items from this seller