**Price in USD**
When Audio Research was founded in 1970, analog vinyl playback was the de facto music source of the time. Audio Research has either incorporated or built stand-alone phono stages since the very beginning, and has continuously provided phono preamplification, even during the height of digital music. The Reference Phono 3 is the next advancement of analog playback.
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Frequency Response: ±.2 dB of RIAA, 10 Hz to 60kHz; 3 dB points below 0.3Hz and above 300 kHz.
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Distortion: Less than .002% at 1.0V RMS 1kHz output.
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Gain: Selectable 51 dB (Low) and 73 dB (High) at 1kHz BAL; 45 dB (Low) and 67 dB (High) at 1kHz SE. (MC and MM compatible).
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Input Impedance: 47k Ohms and 100 pF SE. Selectable loads: 1000, 500, 200, 100, 50 Ohms, and Custom.
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Output Impedance: 400 ohms Balanced, 200 ohms SE. Recommended load 50k-100k Ohms and 100 pF. (10k Ohms minimum and 2000 pF maximum).
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Output Polarity: Non-inverting.
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Phono Equalization: (selectable) RIAA, Columbia, and Decca.
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Maximum Input: 250 mV RMS at 1kHz (680 mV RMS at 10kHz) - Low Gain.
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Rated Outputs: 2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 30V RMS at less than 0.5% THD at 1kHz).
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Controls: 6 Push Buttons: Power, Menu, Option, Enter, Input, Mute.
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Power Supplies: Electronically regulated low and high voltage supplies. Automatic 2 minute warm-up/brown-out mute. Line regulation better than .01%.
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Noise: 0.28 µV equivalent input noise, IHF weighted. Shorted (Low Gain) input (71 dB below 1mV 1kHz input). 0.082 µV equivalent input noise (High Gain). (62 dB below 0.1 mV 1kHz input).
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Tube Complement: (6)-6H30P dual triodes, plus (1 each) 6550WE and 6H30P in power supply.
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Power Requirements: 100-135VAC 60Hz (200-270VAC 50/60Hz) 130 watts. Standby: 2 watts.
