Unison Research

Unison Research Phono One (Trade In)

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  • $1,999.00
  • Regular price $2,200.00
  • 1 available

Living Entertainment North Coast

Unison Research Phono One Valve Phono Preamplifier (Trade In)

The original Phono One was one of the most popular Unison Research products in their history. This item has been used previously. The item may have some signs of cosmetic wear and is missing the Unison Research badge on the front panel, but is fully operational and functions as intended. This product retails brand new at $4900.

Manufacturers Details:

Its production was discontinued a few years ago, but the requests to bring it back were overwhelming. That’s why we’ve introduced its return, with a new and improved design. 

Engineered With Care:

The aesthetics of the Phono One is unchanged, however, maintaining the classic and timeless look of the original version. 

Key Features:

The Phono One, from its beginning, was designed for those who require a phono preamplifier that offers the highest possible sound quality.


Type:  Stereo Phono Valve preamplifier
Class:  Pure A
RIAA:  Passive +/- 0.1 dB (20 Hz / 20 KHz)
Output Impedance: 800 ohm.
Outputs:  1 x line
Gain:  54 dB
Total Harmonic Distorti on (THD):  0.1 % at 1 volt output
Signal to Noise Ratio (S/N):  – 80 dB
Inputs:  1 per fonorivalatore MM o MC
Input Impedance:  47 Kohm – 100 – 50 – 22 ohm / 100 – 200 – 320 – 420
pF (modifiable)
Feedback factor:  0 dB.
Valves:  5 x ECC83 / 12AX7
Alimentatore:  esterno
Dimension:  37.3 x 5.84 x h 24.63 cm.
Net Weight:  3.6 Kg circa (including power supply)