PH7 vs PH9
The PH9's signal-to-noise is 77 dB against the PH7's 76 dB, its mm gain 58 dB against 57.5 dB, and its thd 0.015% against 0.005%. Both share output voltage (0.5V RMS).
AI-generated product photo — not official manufacturer imagery.
AnalogPhono Pre-AmpsTube AmplifiersDiscontinued
Estimated price (community-sourced)
$4,574.50
Around — community and catalog average, updates slowly
About the PH7
The Audio Research PH7 is a high-definition vacuum tube phono preamplifier designed for both moving magnet (MM) and moving coil (MC) cartridges. It offers exceptional performance with low distortion, wide bandwidth, and a dramatically improved noise floor compared to predecessors like the PH5. Key features include full remote control for power, mono/stereo, loading, and mute functions; JFET input stage; all-tube output with four 6922/E88CC dual triodes and three 6H30 regulators; electronically regulated power supplies; and a 30-second warm-up cycle. Housed in a robust chassis with single-ended inputs/outputs and ground terminal, it delivers lifelike imaging, superior dynamics, and coherent tonality across the frequency range. No longer manufactured, it remains highly regarded in reviews for its resolution, speed, and soundstage.
Specifications
Analog Output
Analog signal output specifications
- THD
- 0.005%
- SNR
- 76 dB
- Output Voltage
- 0.5V RMS
- Output Impedance
- 200Ω
Phono Preamplifier
Phono stage specifications
- MM Gain
- 57.5 dB
- MC Gain
- 57.5 dB
- Adjustable Loading
- Yes
- Loading Options
- 47000Ω, 1000Ω, 500Ω, 200Ω, 100Ω
- Adjustable Capacitance
- Yes
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 470 × 132 × 305 mm (W × H × D)
- Weight
- 6.8 kg (15 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions