Product Description:

1. It uses XMOS's latest xCORE-200 series chip XU208 as USB Audio solution.

2. It uses AKM's third generation flagship DAC: AK4493EQ as the main chip of digital-to-analog conversion. AK4118 as Digital Audio Input Receiver Chip

3. It uses STM32 as the control core of the whole machine. Xilinx Large Scale FPGA as Clock System and Digital Audio Stream Processing

4. PCM up to support 384KHz, DSD up tp support 22.5792 MHz (DSD512)

5. DSD adopts the mode of native direct decoding . DSD digital stream works in NOS mode without passing through internal digital filter, which fully conforms to the design idea of HQPlayer.

6. Input interface: USB2.0, SPDIF, BNC, AES, HDMI-IIS, All interface support DSD.

7. Self-developed adaptive clock system technology, Built-in 4-channel independent ultra-low jitter audio crystal oscillator, configures femtosecond local clock system for USB. (Customized version of CHD-575)

8. High Performance Digital-Analog Hybrid Phase-Locked Loop, Excellent clock synchronization recovery technology, It can filter the second PLL of jitter by a large margin.

9. Source Synchronization Technology and FPGA Shaping Technology, Reshaping the isolated I2S signal eliminates the additive jitter caused by the isolation chip.

10. Digital Audio Signal Processing Based on Large-Scale FPGA, Self-developed algorithm, innovative multi-input channel isolation technology, The purity of each input signal is guaranteed.

Technical Indicators:

Sampling Rate Supported by Input Interfaces

PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 352.8KHz, 384KHz

[USB and I2S support full sampling rate, S/PDIF support 192KHz maximum]

DSD: 2.8 MHz (DSD64)   -  DoP,native

5.6 MHz (DSD128)  -  DoP,native

11.2 MHz (DSD256) -  DoP,native

22.5792 MHz (DSD512) -  native

[USB and I2S support all DSD formats, S/PDIF and AES/EBU support DSD64 DOP mode]

Bit width: 32 bit over USB and I2S, 24 bit over S/PDIF

Electrical Standards for Interfaces:

1. USB input socket is standard USB type-B female socket, USB power supply range 4.5V-5.1V

2. SPDIF Interface Input Standard S/PDIF Signal, The input impedance is 75 ohms. AES input impedance 110 ohms

3. The power input is 115V/230V AC, and the TALEMA transformer is used for power supply.

4. I2S input LVDS level in HDMI interface form, compatible with SU-1 interface

Analog output performance:

Output level (0dBFS):

PCM: RCA is 2V RMS, XLR is 4V RMS

DSD: RCA is 1.34V RMS, XLR is 2.68V RMS

Output impedance: 22 ohms (RCA), 45 ohms (XLR)

Frequency response: 20-20kHz +/-0.1Db

SNR: 118dB

Distortion characteristics: THD+N (1kHz, 0dBFS) 0.00042% at fs=44.1Khz(PCM)

THD+N (1kHz, 0dBFS) 0.00029% at DSD12

Dynamic response (1kHz, -60dBFS): 118dB

Separation of left and right channels: > 120dB

System compatibility:

1. Windows 7, Windows 8, Windows 10; 32/64 bit, Special Drivers Need to be Installed

2. Native MacOS 10.6 and later, using system self-drive

3. Native Linux with UAC2 compliant kernel, using system self-drive. (Tested on Ubuntu and Daphile systems, based on the INTEL X86 platform)

4. Android OS 4.2 and above, require equipment to support OTG functionality.

I2S interface uses HDMI socket input:

1. LVDS differential signal with 3.3V level;

2. I2S Interface Compatible with Multiple I2S Output Signal Definitions, An automatic recognition algorithm of PCM/DSD signal is built in the FPGA.

3. DSD ON signals can also be self-defined, DSD ON signal can be input to PIN13, 14, 15, 16 pins of socket at will.

4. Phase Adjustment of PIN1-3 and PIN7-9, The user can configure the phase of the two pairs of outputs through a switch.

Size: 266mm*220mm*46mm

Weight: 3.4KG

AP test chart:

PCM fs=44.1Khz THD+N(1khz) Distortion Test

PCM FS = 44.1Khz (1khz) FFT analysis chart

PCM FS = 44.1Khz Distortion-Frequency Distribution Map

PCM FS = 44.1Khz frequency response

DSD128 FFT Analysis Chart