Description:

The A22 uses two AK4499EQs, one for each of the left and right channels as a pure decoder for DA conversion.

Gustard A22 technical features:

• The left and right channels are each decoded by AKM’s flagship AK4499 chip, which is completely independent and independently grounded to obtain the best performance without mutual interference. • CPLD programmable logic chip, digital integrated circuit with its own logic function, clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technologies, laying a solid foundation for excellent sound quality; • 8-channel hybrid discrete IV conversion circuit and independent adder circuit, fully meet the requirements of AK4499 high current, from the source to ensure; • Digital simulation each adopts a customized 50W audio dedicated toroidal transformer, completely independent power supply does not interfere with each other; • Native full-balanced architecture, without any conversion, complete four-way output; • The analog LPF circuit uses self-developed discrete lines to carefully adjust the parameters of each stage to achieve the best working condition; • Supports 0dB~-90dB for a total of 90 high-quality digital volume adjustments, with a remote control for easy adjustment of volume; • Full interface supports DSD hard solution: IIS supports DDS64, DSD128, DSD256, DSD512 hard solutions; SPDIF, AES/EBU support DSD64, DSD128 hard solution (DOP mode); Optical supports DSD64 (DOP mode); USB supports DDS64, DSD128, DSD256, DSD512 hard solutions; • Rich digital filtering There are 6 types of PCM: Short Delay Sharp Roll-off/Short Delay Slow Roll-off/Sharp Roll-off/Slow Roll-off/Super Slow Roll-off/Low Dispersion Short Delay Filter, There are two types of DSD: L-BW and H-BW • USB uses XMOS 208, a USB AUDIO special chip from XMOS, supporting PCM768 DSD512 • The brightness of the screen is adjustable, it will be automatically remembered after 10 seconds of operation, and the last time it is set to maintain the last setting, humanized operation control; • Machine size: width 330* depth 260* height 65MM (excluding protruding parts); • Package size: length 420* width 360* height 175MM; • Packing weight: 7.5KG; • International voltage AC100V-240V (manual adjustment); • Frequency response: 20Hz-20kHz +/-0.08dB • Line output: RCA output level single-ended 3.0 Vrms @0dBFS, balanced 6.0 Vrms @0dBFS • XLR interface definition: US standard (1 ground, 2 hot, 3 cold)

Gustard DAC-A22 real shot:

Rigorous design, reasonable layout, nice workmanship and solid materials

It adopts AKM company’s two flagship chips AK4499EQ for decoding, one piece left and right, completely independent power supply, independent grounding, to obtain the best performance;

The newly designed 8-channel hybrid discrete IV converter, independent adder circuit, fully meets the requirements of AK4499 high current, from the source to ensure;

Multiple independent power sources with abundant energy and no interference with each other;

The analog LPF circuit is a fully discrete Class A circuit that is specifically debugged for the AK4499 chip.

CPLD programmable logic chip, digital integrated circuit with its own logic function, clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technologies, laid a solid foundation for excellent sound quality.

Independent voltage regulation, multi-stage filtering, separation from left to right, without interference;

Two high-quality audio special toroidal transformers supply power to digital and analog respectively, so that completely independent power supply does not interfere with each other;

The USB module uses XMOS’s XU208 chip and supports PCM768K DSD512 (no USB input without this module); American ACCUSILICON femtosecond crystal oscillator AS318-B;

The full interface supports DSD decoding.

IIS, USB support: DSD64, DSD128, DSD256, DSD512 hard solution; Coaxial (RCA), AES/EBU support: DSD64, DSD128 hard solution (DOP mode); Optical support: DSD64 hard solution (DOP mode);

Digital input:

• IIS, USB support PCM format: 16-32bit/44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 768kHz; DSD64, DSD128, DSD256, DSD512; Coaxial supports PCM format: 16-24bit / 44.1, 48, 88.2, 96, 176.4, 192, 384 kHz; DOP64, DOP128 Optical, AES/EBU support PCM format: 16-24bit / 44.1, 48, 88.2, 96, 176.4, 192 kHz; DOP64

II2S