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Tom Evans Groove 20th Anniversary MK2 Phono Stage
The Groove RIAA stage is the result of over 10 years R&D into disk replay. In developing the Eikos CD player,
Tom argued that as long as the voltage regulators supplying the board were noisier than the quietest passages recorded, and their transient response time was slower than the devices were capable of, there was no point in improving the circuit topology until these fundamental problems were solved. Two years later, he had developed the Lithos voltage regulator, a milestone in musical reproduction. The device is 53 times faster, 1000 times quieter, and 5 decimal places more accurate than the previously 'best' regulators available. Thus was laid the foundation for The Groove phono stage.
The Groove is a dual mono design using one Lithos 7 regulator per side to supply power to each mono signal path p.c.b. The regulators are powered by a dual mmono mains power supply. Channel separation is therefore limited only by the specifications of the cartridge used. All resistors are Holco precision metal film. At the front end, Tom has used very low noise I/Cs (less noise than a 50-Ohm resistor). This stage is followed by a passive RIAA EQ circuit. The third stage is an ultra linear gain amp; around this he has placed the active lower frequency filter to roll off subsonics. The fourth stage is the output stage, which is capable of driving several meters of interconnect.
The case, if made of any metal other than copper, would have a deleterious effect on the sound quality, as field effects of even non-ferrous materials interfere with electron flow. For this reason, the casework is of Perspex, a material with no inductive capacity. Since its launch in the UK, it has become the industry standard. The Groove can be upgraded to the Plus spec.
I have been a long tern user of Tom Evans Vibe + Pulse and decided to upgrade my MircoGrove + to the 20th Anniversary Groove.The Groove was delivered exactly as promised and I have spent the weeks since re-discovering old and new vinyl. The Groove is truly a revelation; I expected the inky blackness of the Lithos low noise background and an improvement over the MicroGroove, which in itself was fabulous. What I wasn't expecting was the degree of improvement. All the things that the MicroGroove does so well is elevated to a whole new level. Depth of sound and detail are quite stunning with a wide and deep sound stage. Three or four hours of listening just fly by, never strained nor tiring. I have revisited everything from modern Goyte (sorry), through Nirvana to ancient mono of Who and 1950's Furtwangler, every time a new experience and new detail discovered! The service from Igloo was brilliant and I enjoyed a wonderful two hours of Peter's time going just talking music.Brilliant product as you'd expect from Tom Evans and brilliant service from Igloo.
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