SOLD COS Engineering D1 DAC / Analog Preamplifier, Remote Control, RRP £8,000, Roon Tested, Boxed. £2600 UK posted.

SOLD

Fullrange

Wammer Plus
Wammer Plus
Sep 12, 2015
474
266
118
Torquay
AKA
Marc
HiFi Trade?
  1. Yes
  2. No
Smooth and engaging hi end DAC.

Used with Roon for effortless high quality sound.

Remote control included.

Handles DSD and all PCM files.

£3000 UK posted with UPS.


C O S D 1

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.

Awards & Reviews

6moons.com's Blue Moon Award.


Audio Art's Best Value Award 2016. (in Chinese)

6moons.com: "An advanced, very stylish DAC/Preamp."

Audio Art: "...lively sound, scintillating and sweet...." (content in Chinese)

HiFi Knight: "This device offers fluency and coherence on a level very rarely heard. Extremely black background and instrument separation are both cherries on top...."

Inearspace Good Buy Award, “Beauty In and Out.”

HiFi+: "...full of expression and nuance...."

HiFi Pig: "It is rare for a first product to be so good. For £8000 (€9000) it might not be cheap, but it is that good." DSC_0034.JPG DSC_0031.JPG DSC_0026.JPG DSC_0035.JPG DSC_0032.JPG DSC_0029.JPG DSC_0030.JPG DSC_0027.JPG DSC_0028.JPG DSC_0025.JPG DSC_0023.JPG DSC_0024.JPG DSC_0036.JPG DSC_0033.JPG
 
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Fullrange

Wammer Plus
Wammer Plus
Sep 12, 2015
474
266
118
Torquay
AKA
Marc
HiFi Trade?
  1. Yes
  2. No
Bump..

Found one for sale from a shop at £3700.
Mine is £1100 cheaper 😀
 
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Reactions: clap

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