Acoustic Precision

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  • Acoustic Precision
  • Aletta Jacobsstraat 240, 2614 JC, Delft, the Netherlands
  • Official website
  • +31 (0)15-8892700
  • No fax number available


Equipment[add model]

Acoustic Precision manufactures or has manufactured the following equipment (click to expand models list):

Solid State Amplifiers

General information [contribute]

Acoustic Precision web site (July 6, 2009): Technology is wonderful, but when it comes to real innovation - something which is completely new, one designer comes to mind more often than any other - that is Tom Evans.

Tom Evans' line of phono preamplifiers, linestages, and amplifiers have earned him a reputation worldwide as a designer of uncommon skills. Like Ferdinand Porsche, his designs are marked by elegant solutions to complex problems. None of these are 'me too' products. None of these designs are rehashings of old thinking with a few 'audiophile' parts thrown into the mix. Taken as a whole, they are designs of genius.

Importantly, the change wrought by the suite of Tom Evans equipment is not merely an advancement in sound quality -- though it is surely that -- but it also represents the most significant advancement in the reproduction of musical realism that I have encountered short of sitting in with a band. (Jeff Day,

TAC(July 6, 2009): Tom Evans also modified excisting equipment and brought it to a new levels. The Eikos is an example of this.


Acoustic Precision web site (July 5, 2009): With a background of working with defense contractors, with exposure to components unused in the field of Hi-Fi, Tom Evans was dissatisfied with the standard of hi-fi in the late seventies. He began a journey which took him eventually into the realms of theoretical physics and psycho- acoustics. His first commercial product in 1986 "The Finestra" pre-amp was using multi-layered circuit boards to optimize signal paths. He had already developed an ultra linear circuit and had recognized the importance of the use of Perspex in case work to minimize eddy currents, vital in preserving signal integrity in order to reproduce maximum resolution.

Milestones along the way were his collaboration with Michell Engineering to produce a phono stage "The Iso" along with Pre and power amps for Michell. With the formation of Trichord Research came the original work on precision crystal oscillators and the start of his work in digital replay. Tom developed the Trichord CD precision clock to fit to other manufacturer's CD players, and also the stand-alone Trichord DAC.

A decision to 'go solo' brought about a rethink in what was important in CD replay, realizing the potential of what was theoretically possible from 44.1Khz 16 bit. This fundamental research eventual bore fruit with the creation of the Eikos CD player from Acoustic Precision.

One year after the launch of the Eikos CD player Evans realized that the ceiling of performance achievable was being compromised by even the best voltage regulators in key positions on the board. The regulators had voltage noise figures equivalent to that of the output of an average moving coil cartridge and a transient response/recovery time that was measured in "Weeks per Volt". Nine months later he had developed the Lithos regulator, a discrete fast transient response time ultra low noise a devise 1000 times quieter, 53 times faster, and five decimal places more accurate than the best regulators available.

He realized that this was the key that would unlock the potential of vinyl as the application of Lithos to an analogue source would move the goal posts of performance in speed resolution and dynamic range, in a media unfettered by sampling rate and bandwidth. He returned to his roots to design "The Groove" phono stage.

With the advanced Lithos technology providing a quantum leap in speed and resolution capability over conventional electronics, the way forward is open to develop a new range of products that re-defines the performance of reproducing recorded music from all sources.

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