Unison Research · Phono Stages
Phono One
Phono One is a stereo valve phono preamplifier with passive RIAA equalization, selectable loading, and support for MM or high-output MC cartridges.
fig. 01 · phono stages
Phono One
Phono one
From Unison Research
Phono One brings back Unison Research's valve phono preamplifier in a revised design that keeps the original visual character. It uses 5 ECC83 valves, passive RIAA equalization, selectable resistance and capacitance loading, and an external power supply for MM and high-output MC cartridge systems.
Specifications
| 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 |
| THD | 0.1 % @ 1V output |
| Signal to noise ratio | 80 dB |
| Inputs | 1 per fonorivalatore MM o MC High Output (>2mV) |
| Input impedance | 47 Kohm - 100 - 50 - 22 ohm / 100 - 200 - 320 - 420 pF ( selectable) |
| Feedback factor | 0 dB. |
| Valves | 5 x ECC83 / 12AX7 |
| Power supply | external |
| Dimensions | 37.3 x 5.84 x h 24.63 cm. |
| Weight | 3.6 Kg circa (including power supply) |
| Product type | valve phono preamplifier |