Product: Audio Research PH3 Tube MM Phono Preamplifier; PH-3Product SKU: 80931Serial Number: 08581007Input Voltage: 120VCosmetic Description: Very good condition with minimal visible cosmetic wear including some very light marks on the top and sides of the chassis. What is ...Product: Audio Research PH3 Tube MM Phono Preamplifier; PH-3Product SKU: 80931Serial Number: 08581007Input Voltage: 120VCosmetic Description: Very good condition with minimal visible cosmetic wear including some very light marks on the top and sides of the chassis. What is Included: Phono Preamplifier, Three Sovtek 6922 Tubes, Manual, Power Cable, Factory Packaging - Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.
- Age: Unknown# of Owners: 1Tobacco Exposure: No - Service History: None - MSRP: $1995Other Notes: "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. Total gain of the PH3 is 54 d - B (non-adjustable).
Used with typical line preamplifiers having 12 to 18 d - B of gain, the PH3 is suitable for phono cartridges having .25 m - V output or higher. Input impedance is factory-set at 47K ohms, and input capacitance at 90 p - F. 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." Items with factory packaging will be double boxed.