The technical features of the Esther A22 are as follows:
Each of the left and right channels is decoded by a flagship AK4499 chip of AKM Company, which is completely independent of power supply and grounding independently to obtain the best performance and do not interfere with each other.
CPLD programmable logic chip, self-constructed digital integrated circuit with logic function, clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technologies have laid a solid foundation for excellent sound quality.
The 8-channel hybrid discrete IV conversion circuit and the independent adder circuit fully meet the requirements of AK4499 high current and begin to ensure from the source.
Each of the digital simulations adopts a custom 50W special ring transformer for sound, and the power supply is completely independent and does not interfere with each other.
Native fully balanced architecture, no conversion, complete four-way output;
The analog LPF circuit adopts the discrete circuit developed by itself, and carefully adjusts the parameters of each level in order to achieve the best working state.
Support 0dB~-90dB 90 high quality digital volume adjustment, with remote control to adjust the volume conveniently
The full interface supports DSD hard solutions:
IIS supports DSD64, DSD128, DSD256, DSD512 hard solution
SPDIF, AES/EBU support DSD64, DSD128 hard solution (DOP mode)
Optical supports DSD64 (DOP mode)
USB supports DSD64, DSD128, DSD256, DSD512 hard solution
Rich digital filtering
PCM has six kinds of: 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 kinds of DSD: L-BW and H-BW
USB uses USBAUDIO special chip XU208, of XMOS Company to support PCM768 DSD512.
The screen brightness can be adjusted, no operation 10 seconds after automatic memory, the next boot to maintain the last setting, humanized operation control
Machine size: wide 330 * Deep 260 * High 65MM (excluding protruding parts)
Packing size: 420 * wide 360 * high 175MM
Including packing weight: 7.5KG
International voltage AC100V-240V (manual regulation)
Frequency response: 20Hz-20kHz + /-0.08dB
Line output: RCA output level single end 3.0 Vrms @ 0dBFS, balance 6.0 Vrms @ 0dBFS
XLR interface definition: American standard (1 ground, 2 hot, 3 cold)
Black / white: A22 (without USB input)
Black / white: A22U with USB input)
The actual shoot of DAC-A22:
Rigorous design, reasonable layout, neat workmanship, solid material
AKM company two flagship chips AK4499EQ decoding, left and right 1 chip, completely independent power supply, independent grounding, to obtain the best performance
The newly designed 8-channel hybrid discrete IV conversion circuit and independent adder circuit fully meet the requirements of AK4499 high current and begin to ensure from the source.
Multiple sets of independent power supply, full of energy, do not interfere with each other
Analog LPF circuit is a fully discrete class A circuit which is specially debugged for AK4499 chip. Each discrete device only needs to consider its own performance alone, so for this device alone, there are a lot of application limitations, so it can give full play to the performance of a single component.
Because unlike integrated circuits, which can not be separated and changed in the chip, the use of discrete devices is more flexible, can freely adjust the parameters of each level to achieve the best working state, but also because its developability is stronger, and for the distorted part is relatively controllable, can bring greater variability to different decoding architecture sound style.
The disadvantage of discrete devices is that the distributed parameters have a great influence, so it is very difficult to design and debug, which requires certain technical experience and a long debugging process. In terms of consistency, it is also relatively weak, so it is necessary to study the materials very well.
CPLD programmable logic chip, self-constructed logic function digital integrated circuit, clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technology, laid a solid foundation for excellent sound quality.
Independent voltage stabilization, multi-stage filtering, left and right separation, until no interference
Two special ring transformers for high quality sound supply digital and analog power respectively, and completely independent power supply is not interfered 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 fiber support: DSD64 hard solution (DOP mode)
IIS pin definition
Frequency response
THD+N
Signal-to-noise ratio
Dynamic range
1k FFT
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
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