COS ENGINEERING

D10

PREAMPLIFIER WITH DAC & HEADPHONE AMP
COS 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 onesecond buffer before
converting to analog signals, under the coordination of a crystal oscillator with a jitter precision less than 1ps and a dedicated reclocking circuitry.
D10 uses two-stage regulation to provide clean power. Two toroid transformers power the digital circuit and the analog circuit separately, thereby eliminating possible

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.

HEADPHONE AMPLIFIER
The D10 is capable of driving headphones of high and low impedance. It has a pair of 3-pin XLR connectors that accommodate 2 unbalanced headphones or a single balanced one. An extra 4- pin XLR connector is included for balanced headphones.

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. The D10 includes MQA technology, which enables you to play back MQA audio files and streams, delivering the sound of the original master recording. ‘MQA’ indicates that the product is decoding and playing an MQA stream or file, and denotes provenance to ensure that the sound is identical to that of the source material. ‘MQA.’ indicates it is playing an MQA Studio file, which has either been approved in the studio by the artist/producer or has been verified by the copyright owner.

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.

Technical Specifications

Pre-Amplifier
Analogue Input: Balanced X1, Unbalanced X1
Analog Output: Balanced X1, Unbalanced X1
Residual Noise: < 2uV (-114dBV) (20Hz~20KHz, non-weighted, input terminated)
Input Overload: 16V (balanced), 8V (unbalanced)
Input Impedance: 100Kohm
Output Impedance: 200 ohm (balanced), 100ohm (unbalanced)
Maximum Output: 16V (balanced), 8V (unbalanced)
Frequency Response:+/-0.1dB, 20Hz~20KHz
THD+N: < 0.001% (-100dB) (20Hz ~ 20KHz non-weighted)
Signal To Noise Ratio: > 110dB, 20Hz~20KHz non-weighted
Crosstalk: < -120dB
Volume: Precision resistor array, 140 steps by 0.5dB/step, -64db to +6dB
Headphone Amplifier: audio jack X2 (unbalanced X2), XLR-3 X2 (balanced X1), XLR-4 X1 (balanced X1)

DAC
Digital Inputs: USB X 1, Asynchronous Audio Class 2.0, SPDIF BNC X1, AES XLR X1, Toslink X1, I2S X1 (HDMI, differential)
Sampling Rate: PCM up to 192Kbps 24 bit, DSD up to DSD256 (USB), DSD64 (all other inputs)
Frequency Response: +0dB, -0.5dB, 20Hz ~ 20KHz
Full Scale Output: 2V (unbalanced), 4V (balanced)
THD+N: < 0.001% (-100dB) (192Ksps, 24-bit, 20Hz ~ 20KHz, A-weighted)
Signal To Noise Ratio: > 110dB, 24-bit, 20Hz~20KHz, A-weighted
DAC: 24-bit DAC X2, up to 192Kbps, 24-bit
Digital Filter: COS proprietary, linear phase delay
Audio clock jitter: < 0.1ps

Phono-Amplifier
Gain: 40, 50 or 60dB
Input Resistance: 47 Kohm to 10 ohm
Input Capacitance: 0 to 750pF
RIAA response:<+/-0.2dB/20Hz~20KHz
Residual Noise: <30uV (input shorted, 40dB gain, 20Hz~20KHz) <300uV (input shorted, 60dB gain, 20Hz~20KHz)
THD+N: < -90dB (40dB gain,470ohm load, 1KHz, 2Vrms output) < -70dB (60dB gain,470ohm load, 1KHz, 2Vrms output)

Streaming
DLNA 1.5 & UPnP AV1.0
Ethernet 10/100 Base-T
Low jitter TCXO 25MHz crystal
WiFi, 802.11 ac/abgn
ROON ready and tested
Tidal, Deezer, Qobuz, Spotify, MQA full decoding

General
Display: 256 * 64 White OLED
Weight: 10kg
Dimensions: 415mm (W) X 280mm (D) X 100mm (H)
Power: 100~120VAC or 200~240VAC selectable Normal Operation < 50W, standby < 0.5W