Valve phono stages are relatively rare. Valve phono stages that are affordable and offer great sound are even rarer. That’s what makes the Unison Research Simply Phono so unique.
The Simply Phono, a Class A phono stage with zero feedback and 3 ECC83 (12AX7) valves, is a perfect complement to all Unison line level amplifiers and is a superb addition to any quality hi-fi set-up.
As the vinyl hi-fi market continues to grow from strength-to-strength, Unison Research have decided to bring their expert valve knowledge to one of the often over-looked aspects of vinyl playback; phono pre-amplification. Phono stages are essential for taking the low output from a turntable and amplifying it to Line level, so modern amplifiers can deliver an optimised sound signal to your speakers. Sharing its name and appearance with an older model from the Unison Research range, the new Simply Phono boasts enhanced circuitry and an improved layout to deliver first-class audio.
The Simply Phono is an all-tube phono pre-amplifier. It employs four ECC83 (12AX7) double triodes, arranged so the first two tubes act in parallel as a maximum gain stage, implementing a particular configuration called “ionic bias”, in order to improve performance. The RIAA equalization network is a completely passive solution, and premium components have been selected throughout to deliver truly high-end characteristics.
The Simply Phono can accomodate both Moving Magnet (MM) and mid-to-high output Moving Coil (MC) cartridges, and features switchable impedance settings for optimum load matching. Due to its high-end specifications, the Simply Phono is a great addition to systems built around Unison Research's valve amplifiers as well as other non-Unison Research designs.
In the UK the Simply Phono is supplied with the upgraded external power supply for improved performance.
Some Unison Research Amplifiers have outputs to power the Phono Stage - Phono Stage can be supplied without the PSU to save costs
I give it my highest recommendation, and it will surely win a PFO Writers Choice Award from yours truly for 2012. Check it out if you're in the market for what I would consider a reference-level tube phonostage, but you can't afford to spend five to ten grand! The Simply Phono is simple in its form, but soulful in its performance. Michael Mercer Positive Feedback
- Pure Class A valve phono stage
- Four ECC83 tubes used
- MM and mid-high output MC cartridge compatible
- Switchable impedance settings
- Improved external power supply included as standard
- Excellent complement to the valve amplifier range
||Pure Class A Valve Phono Stage
||Passive ±0.2dB (20Hz / 20kHz)
||1 x Line (RCA pair)
||0.4% @ 1V output
||1 x RCA Pair (MM or MC)
47kΩ / 100Ω / 50Ω / 22Ω
||4 x ECC83 (12AX7)
|Dimensions (W x D x H):
||140 x 290 x 105mm
||3kg (incl. PSU)