PH9 Phono Preamplifier By Audio Research

The PH9 delivers high-performance phono preamplification designed to pair seamlessly with a wide range of cartridges and turntable systems.

At its core, three 6H30 vacuum tubes support a clean, refined signal path that combines the warmth and musicality associated with tube audio with impressive transparency and detail retrieval. The result is a natural, engaging listening experience that accurately reveals the unique character of different cartridges and tonearms.

To support system flexibility, the PH9 offers five selectable impedance settings for cartridge loading, conveniently adjustable via the included metal remote control. Additional user-friendly features include cartridge impedance monitoring, tube hour tracking, auto shutdown functionality, and an intuitive onboard menu system.

Developed by Audio Research, a brand recognized for decades of innovation in high-fidelity audio, the PH9 is designed to provide exceptional vinyl playback performance, long-term reliability, and lasting value for dedicated music enthusiasts.

The Speaker Shacks
“The Audio Research receives an Outstanding product award from The Speaker Shack which I really do think that PH9 should be on your list if you are wanting to get the best, and the Foundation series gives you that, the best for any system unless you can afford the more costlier ARC’s that is.”

https://www.thespeakershacks.co.uk/2019/09/audio-research-ph9-phono-stage-review.html

• Frequency Response: ±2 dB of RIAA, 5 Hz to 20 kHz; 1 dB points below 0.3 Hz and above 80 kHz
• Distortion: Less than .015% at 3V RMS 1kHz output
• Gain: 58 dB at 1 kHz
• Input Impedance: Selectable loads: 47k, 1000, 500, 200, 100 Ohms
• Output Impedance: 200 ohms. Recommended load 50k-100k Ohms and 100 pF. (10k Ohms minimum and 2000 pF maximum).
• Output Polarity: Non-inverting
• Maximum Input: 80 mV RMS at 1kHz
• Rated Outputs: 0.5V RMS 10 Hz to 60 kHz, into 100K ohm load (maximum balanced output capability is 0.46V RMS at less than 0.5% THD at 1kHz)
• Controls: 6 Push Buttons: Power, Menu, Option, Enter, Input, Mute
• Power Supplies: Electronically regulated low and high voltage supplies. Automatic 2 minute warm-up/brown-out mute. Line regulation better than .01%
• Noise: 77 dB, shorted inputs
• Tube Complement: (3)-6H30P dual triodes, plus (1 each) 6550WE and 6H30P in power supply
• Power Requirements: 100-125VAC 60Hz (200-250VAC 50/60Hz) 120 watts maximum. Standby: 2 watts
• Dimensions:
  • Width: 19″ (48 cm)
  • Height: 6.5″ (13.7 cm)
  • Depth: 13.7″ (34.8 cm)
  • Handles extend 1.6″ (4 cm) forward of front panel
  • Weight: 15.4 lbs. (7 kg) Net
  • Shipping Weight: 23.5 lbs. (10.7 kg)