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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.
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