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About the PH9
The Audio Research PH9 phono stage features a trio of 6H30 vacuum tubes in a simple signal path for transparent, vibrant sound. It offers five selectable input impedances (47k, 1000, 500, 200, 100 Ohms) adjustable via remote or front panel menu, supporting a wide range of MM and MC cartridges. Additional features include tube hour tracking, auto shutdown, and electronically regulated power supplies with vacuum tube regulation. Hand-assembled with a focus on high-definition audio principles since 1970, it delivers natural openness, extended frequency response, low noise, and dynamic bass.
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