When Every Note Is In The Right Place

C.O.S. ENGINEERING 

COS Engineering, founded by three close friends serious about audio entertainment, is dedicated to developing high end,  Hi-Fi gear of the digital era that renders music listening a sheer natural pleasure.

  Debut in 2014.

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D1, a fusion of a DAC and a pre-amp with style, is conceived and designed not only to make music based on digital data real and pleasurable, but also to meet the demand of those with willing and perfectionist ears. It renders crystal clear, spacious and dynamic music.

STYLISH DESIGN

The exterior of D1, composed of aerospace grade aluminum alloy which seals off electric and magnetic interference from outside, is crafted finely to embody a structure of straight lines and a single circle.

 

ALGORITHM AND DSP

COS's proprietary algorithm with a linear-phase delay FIR filter can up-sample original data to 176.4K or 192K, and this massive computation is handled by a powerful 3648 MMAC/sec DSP.

 

BUFFER and RE-CLOCKING

D1 stores digital data in a one-second buffer before converting to analog signals, under the coordination of a crystal oscillator with a jitter precision less than 1ps and a dedicated re-clocking circuitry.

 

DUAL POWER SUPPLY

Two torroid transformers power the digital circuit and the analog circuit separately, thereby eliminating possible interferences.

 

PARALLEL STRUCTURE WITH TUNING AND MATCHING

The analog circuit bifurcates into two boards to eliminate cross-talk, and the high-performance DAC chips, one on each board running as mono, are manually tuned and matched to attain a lower distortion.

 

FULLY BALANCED DESIGN

D1’s balanced design ensures that even harmonics match and are gracefully cancelled out. Distortions are low to the extent possible.

 

VOLUME CONTROL

D1’s volume control is composed of a ladder of high precision resistors and an array of analog switches which are low in resistance, noise, and distortion.

$15,000 inc GST RRP - Available in Silver Only 

COS D1

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C O S D 1 0 

D10 is a dream component for your beloved sonic pleasure. It is a DAC, a pre-amp, and a headphone amp, well built with streaming capability. Yes, the same spacious, supple and dynamically powerful sound that COS products have been offering. D10 is also a phono amp, one that delivers from your preferred vinyls luscious vibes. 

Built with the utmost care and patience to deliver this stunning DAC, it shares that perfectly sculptured design as the other family members. 

 

COS ALGORITHM, BUFFER and RE-CLOCKING

COS's proprietary algorithm with a linear-phase delay FIR filter can up-sample original data to 176.4K or 192K. D10 stores digital data in a one-second buffer before converting to analog signals, under the coordination of a crystal oscillator with a jitter precision less than 1ps and a dedicated re-clocking circuitry.

 

STREAMING (optional)

Stable and quality streaming is available, with or without a wire, for TiDAL, Spotify, Deezer, and Qobuz. Setup is easy with iOS and Android applications.

 

PHONO-AMPLIFIER (optional)

There are 5 loading resistors and 3 loading capacitors, all selectable, to accommodate phono cartridges of your choice. Other features include JFET input stage, on-board low-noise linear regulator, and handpicked components for RIAA curve matching and zero capacitor between audio signal paths. Extremely low in noise and distortion.

 

TWO-LAYER HOUSING

D10 has an NCT internal chassis and an aluminum exterior. This design provides a fortified frame that make possible lowered noise and minimized interference, plus a fine outlook.

 

REMOTE CONTROL 

Stylish, ergonomic

 

RRP $7,500 ,

Steaming Module $1,595, Phono Module $1,250 

NEW D-10-V2 available now.  Now even better.