GUSTARD DAC-A22 DAC Dual AK4499 XMOS Solution Native Balanced Decoder

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Price: $1,079.99 $1,079.99
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NOTE:

The available unit is standard version. The MQA version needs to be available later. If you order now, we will send the standard version to you. Thank you!

 

Gustard has been researching the audio field for nearly ten years, and its various audio DAC products have been widely recognized by users all over the world.

In this era of rapid development of digital technology, Gustard never dared to slack off, and has a systematic and in-depth study of audio DAC chips from many manufacturers. We have systematically studied the chips of AKM (Asahi Kasei). Now, based on the careful debugging of their previous generation flagship chip AK4497, we released Gustard's first audio DAC product with dual AK4499. That is, A22.

The analog LPF circuit of the A22 still uses the full discrete Class A circuit that we have applied for many years. This discrete circuit has been very matured after many years of practical application. 

This time we also made targeted adjustments to other peripheral circuits of the AK4499 chip to improve the overall quality of the A22. A22 is very good in both user function and performance.




The Gustard A22 is an audio DAC that uses two AK4499EQs for dual mono audio digital-to-analog conversion.

 




Gustard A22 technical features:

 

• The left and right channels are each using a AKM company's flagship chip AK4499 for dual mono audio digital-to-analog conversion. The two-channel DAC circuits are completely independent and independently grounded, and do not interfere with each other to achieve optimal performance.
 
• Using CPLD programmable logic chip, self-developed logic function digital integrated circuit, built-in 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 output current, and ensure high sound quality from the source;
 
• The digital and analog circuits each use a specially customized 50W audio dedicated toroidal transformer, which is completely independent and does not interfere with each other;
• Native fully balanced architecture, without any conversion, complete two-channel fully balanced output;
 
• The analog LPF circuit uses the discrete line independently developed by Gustard, and has carefully adjusted each level of parameters to achieve the best working condition;
 
• Supports high-quality digital volume adjustment of 0dB~-90dB total 90 positions, with remote control for easy adjustment of volume;
 
• All input interfaces support DSD:
IIS supports DSD64, DSD128, DSD256, DSD512;
SPDIF, AES/EBU support DSD64, DSD128 (in DOP mode);
Optical supports DSD64 (in DOP mode);
USB supports DSD64, DSD128, DSD256, DSD512;
 
• A wide range of digital filter options
The PCM has six digital filters available: 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,
DSD has 2 digital filters available: L-BW and H-BW
 
• The A22's built-in USB digital audio interface daughter board uses an XMOS USB audio controller XU208, which supports up to PCM768 DSD512.
 
• The brightness of the screen is adjustable, it will be automatically remembered after 10 seconds of operation, and the previous settings will be automatically maintained at the time of power-on;
 
• Dimensions: width 330* deep 260* height 65MM (without protruding parts);
 
• Package size: length 420* width 360* height 175MM;
 
• Packing weight: 7.5KG;
 
• International voltage AC100V-240V (requires manual adjustment);
 
• Frequency response: 20Hz-20kHz +/-0.08dB

• Line output level:
RCA output level 3.0 Vrms @0dBFS,
XLR output level 6.0 Vrms @0dBFS

• XLR pin definition: US standard (1 ground, 2 hot, 3 cold) 

The Gustard A22 is available in black and silver. 
And you can choose whether to have a built-in USB digital audio interface daughter board depending on whether you need USB input function.




Gustard DAC-X26 real shot:
Rigorous design, reasonable layout, nice workmanship and solid materials



The left and right channels are each using a AKM company's flagship chip AK4499 for dual mono audio digital-to-analog conversion. The two-channel DAC circuits are completely independent and independently grounded, and do not interfere with each other to achieve optimal performance;



The newly designed 8-channel hybrid discrete IV conversion circuit and independent adder circuit fully meet the requirements of the AK4499's large output current, ensuring high sound quality from the source;



Multiple sets of independent power supply circuits ensure sufficient energy and no interference with each other;



The analog LPF circuit of the A22 is a fully discrete Class A circuit that is specially designed and tuned 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.

Each discrete device only needs to consider its own performance separately, so there are fewer application limitations than using integrated op amp chips, so that the performance of individual components can be fully utilized.

Unlike transistors inside an integrated circuit that are integrated into the die and cannot be adjusted and changed, the use of discrete devices is more flexible. We can freely adjust the parameters of each stage to achieve optimal operation. Also because of its It is more developable and relatively controllable for parts that produce distortion, giving a different variability in sound style for different audio DAC circuits.

The disadvantage of discrete devices is that their distribution parameters have a great influence, and it is difficult to design and debug. It requires certain technical experience and a long debugging process. Moreover, the consistency of the discrete circuits is relatively weak, so the materials need to be more reliable.




Using CPLD programmable logic chip, self-developed logic function digital integrated circuit, built-in clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technologies, laying a solid foundation for excellent sound quality.



A22's power supply circuit uses multiple independent voltage regulators and multi-stage filtering to achieve independent power supply to the left and right channels and avoid mutual interference;



The digital and analog circuits each use a specially customized 50W audio dedicated toroidal transformer, which is completely independent and does not interfere with each other;




The A22's built-in USB digital audio interface daughter board uses an XMOS USB audio controller XU208, which supports up to PCM768 DSD512.( No USB input version without this module);
 
A22 USB digital audio daughter board built-in audio clock source using 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

IIS:

NOTE:

The available unit is standard version. The MQA version needs to be available later. If you order now, we will send the standard version to you. Thank you!

 

Gustard has been researching the audio field for nearly ten years, and its various audio DAC products have been widely recognized by users all over the world.

In this era of rapid development of digital technology, Gustard never dared to slack off, and has a systematic and in-depth study of audio DAC chips from many manufacturers. We have systematically studied the chips of AKM (Asahi Kasei). Now, based on the careful debugging of their previous generation flagship chip AK4497, we released Gustard's first audio DAC product with dual AK4499. That is, A22.

The analog LPF circuit of the A22 still uses the full discrete Class A circuit that we have applied for many years. This discrete circuit has been very matured after many years of practical application. 

This time we also made targeted adjustments to other peripheral circuits of the AK4499 chip to improve the overall quality of the A22. A22 is very good in both user function and performance.




The Gustard A22 is an audio DAC that uses two AK4499EQs for dual mono audio digital-to-analog conversion.

 




Gustard A22 technical features:

 

• The left and right channels are each using a AKM company's flagship chip AK4499 for dual mono audio digital-to-analog conversion. The two-channel DAC circuits are completely independent and independently grounded, and do not interfere with each other to achieve optimal performance.
 
• Using CPLD programmable logic chip, self-developed logic function digital integrated circuit, built-in 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 output current, and ensure high sound quality from the source;
 
• The digital and analog circuits each use a specially customized 50W audio dedicated toroidal transformer, which is completely independent and does not interfere with each other;
• Native fully balanced architecture, without any conversion, complete two-channel fully balanced output;
 
• The analog LPF circuit uses the discrete line independently developed by Gustard, and has carefully adjusted each level of parameters to achieve the best working condition;
 
• Supports high-quality digital volume adjustment of 0dB~-90dB total 90 positions, with remote control for easy adjustment of volume;
 
• All input interfaces support DSD:
IIS supports DSD64, DSD128, DSD256, DSD512;
SPDIF, AES/EBU support DSD64, DSD128 (in DOP mode);
Optical supports DSD64 (in DOP mode);
USB supports DSD64, DSD128, DSD256, DSD512;
 
• A wide range of digital filter options
The PCM has six digital filters available: 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,
DSD has 2 digital filters available: L-BW and H-BW
 
• The A22's built-in USB digital audio interface daughter board uses an XMOS USB audio controller XU208, which supports up to PCM768 DSD512.
 
• The brightness of the screen is adjustable, it will be automatically remembered after 10 seconds of operation, and the previous settings will be automatically maintained at the time of power-on;
 
• Dimensions: width 330* deep 260* height 65MM (without protruding parts);
 
• Package size: length 420* width 360* height 175MM;
 
• Packing weight: 7.5KG;
 
• International voltage AC100V-240V (requires manual adjustment);
 
• Frequency response: 20Hz-20kHz +/-0.08dB

• Line output level:
RCA output level 3.0 Vrms @0dBFS,
XLR output level 6.0 Vrms @0dBFS

• XLR pin definition: US standard (1 ground, 2 hot, 3 cold) 

The Gustard A22 is available in black and silver. 
And you can choose whether to have a built-in USB digital audio interface daughter board depending on whether you need USB input function.




Gustard DAC-X26 real shot:
Rigorous design, reasonable layout, nice workmanship and solid materials



The left and right channels are each using a AKM company's flagship chip AK4499 for dual mono audio digital-to-analog conversion. The two-channel DAC circuits are completely independent and independently grounded, and do not interfere with each other to achieve optimal performance;



The newly designed 8-channel hybrid discrete IV conversion circuit and independent adder circuit fully meet the requirements of the AK4499's large output current, ensuring high sound quality from the source;



Multiple sets of independent power supply circuits ensure sufficient energy and no interference with each other;



The analog LPF circuit of the A22 is a fully discrete Class A circuit that is specially designed and tuned 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.

Each discrete device only needs to consider its own performance separately, so there are fewer application limitations than using integrated op amp chips, so that the performance of individual components can be fully utilized.

Unlike transistors inside an integrated circuit that are integrated into the die and cannot be adjusted and changed, the use of discrete devices is more flexible. We can freely adjust the parameters of each stage to achieve optimal operation. Also because of its It is more developable and relatively controllable for parts that produce distortion, giving a different variability in sound style for different audio DAC circuits.

The disadvantage of discrete devices is that their distribution parameters have a great influence, and it is difficult to design and debug. It requires certain technical experience and a long debugging process. Moreover, the consistency of the discrete circuits is relatively weak, so the materials need to be more reliable.




Using CPLD programmable logic chip, self-developed logic function digital integrated circuit, built-in clock management, 2nd PLL digital shaping, DOP demodulation, PCM/DSD depop switch and other exclusive technologies, laying a solid foundation for excellent sound quality.



A22's power supply circuit uses multiple independent voltage regulators and multi-stage filtering to achieve independent power supply to the left and right channels and avoid mutual interference;



The digital and analog circuits each use a specially customized 50W audio dedicated toroidal transformer, which is completely independent and does not interfere with each other;




The A22's built-in USB digital audio interface daughter board uses an XMOS USB audio controller XU208, which supports up to PCM768 DSD512.( No USB input version without this module);
 
A22 USB digital audio daughter board built-in audio clock source using 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

IIS:

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In the event that a shipment is refused delivery by the recipient, is undeliverable, or is returned to sender, SHENZHENAUDIO will process a refund to the original payment method used.

If a customer would like the order reshipped, they’ll be charged a reshipment fee. Customers may also be subject to a restocking fee of up to 20 percent of the product cost.



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Given the amount of shipping partners we work with and the vast coverage area we serve, there are likely regions with much longer transit times than others. If you have any feedback, suggestions, or problems with the courier of your shipment, please feel free to submit a support ticket via the "Contact Us" button below.

Our goal is to provide our customers with the best shipping experience possible at a reasonable cost. This is why we constantly negotiate with existing shipping partners for lower rates and actively test new couriers for potential opportunities.



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To determine if your order is eligible for shipment to PO boxes or an APO/FPO address, please contact SHENZHENAUDIO Support.



Estimated Delivery Time

For customers in the continental United States:
5 to 14 business days from the date of shipping

For customers in Hawaii and Puerto Rico:
2 to 4 weeks from the date of shipping
International customers can expect longer shipping times, depending on the country in which they live:

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Australia, New Zealand, Germany, France, and the UK: 2 to 4 weeks from the date of shipping
Other countries not listed above: 3 to 6 weeks from the date of shipping

Please keep in mind that these are rough estimates and shipments can be delayed due to unforeseen circumstances, like postal strikes or severe weather.

If, for some reason, you don’t receive your order within the estimated time frame provided above and suspect that it might be lost in transit, please submit a support ticket from your transactions page and we can look into the order with the courier. Lost-in-transit requests must be submitted to SHENZHENAUDIO Support within 4 months of the date of shipping or before the courier archives the tracking information.



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If you are dissatisfied with your purchase for any reason, you may return it to SHENZHENAUDIO within 30 days of the received date, subject to the conditions and exclusions below.



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Please read conditions below. If all conditions are not met, SHENZHENAUDIO reserves the right to refuse the return. All returned items must be in new condition, in their original unaltered box (including an intact UPC code) and must include all packing material, blank warranty cards, manuals and accessories. SHENZHENAUDIO can only refund the original purchase price. Shipping and handling fees are nonrefundable.



Defective or Damaged Items

Defective items may be repaired, exchanged or refunded at our discretion for the same model or manufacturer's equivalent model.



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Once we receive and inspect your item(s), we will credit your account. Please allow 5-7 days for a credit to appear on your account. In most cases, we will issue your refund in the same way you made the original purchase. Please note: we can only refund the original purchase price. Shipping and handling fees are nonrefundable.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.



Shipping

To return your product, you should mail your product to: Rm306, Block A, ChengShiShanHai Center, ZhongXing Road ,Bantian Street, LongGang Zone, Shenzhen, Guangdong, China

If you’ve done all of this and you still have not received your refund yet, please contact us at support@shenzhenaudio.com.