Audio Research REF PHONO 3 SE
Valve phono preamplifier from Audio Research, fitted with six 6H30 valves and selectable gain, designed for demanding vinyl collections.
Description
The REF Phono 3 SE is a valve phono preamplifier designed by Audio Research to accurately reproduce the signal from a vinyl cartridge. It occupies a high-end position within the manufacturer's range, intended for systems where the vinyl source is a central element of listening.
Its gain stage is built around six high-current 6H30 valves, a configuration designed to offer extended dynamics and good reproduction of musical nuance. The manufacturer also highlights custom components, including in-house designed capacitors, which contribute to the harmonic texture and detail resolution sought in this type of unit.
Gain is selectable depending on the output used: 45 dB or 67 dB on the unbalanced output, 51 dB or 73 dB on the balanced output. This range allows the unit to be matched to a wide variety of cartridges, from MM to low-output MC. Loading can be adjusted on the fly, and the unit has two sets of inputs, each benefiting from the same adjustment flexibility.
On the equalisation side, the REF Phono 3 SE offers several curves: RIAA, Decca and Columbia. This multiple compatibility allows older pressings that do not follow the now-standard RIAA norm to be played correctly, an advantage for collectors with records from different eras.
This preamplifier is aimed at a vinyl enthusiast who already has a high-end system in place, looking for a component capable of getting the best out of one or more cartridges, with the flexibility to switch from one cartridge to another without having to resort to internal soldering adjustments.
What to check before buying used
The six 6H30 valves directly affect sound quality: it is worth checking their installation date and listening for any hiss, microphonics or channel imbalance at start-up. The proprietary capacitors and the contacts of the gain and loading selectors also deserve a check, as does the operation of both sets of inputs in every position. A unit left unused for a long period requires a gradual warm-up to allow the valves and capacitors to return to their nominal values.
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