Singxer SDA-6 Primary Direct Solution CCHD-957 Femtosecond Clock of USB NOS Model DSD512 AK4499 DAC Decoder

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Because the high-end version requires manual adjustment and production, it takes more time to ship. The high-end version adopts a non-loop negative feedback full DC full-balanced discrete class-A output circuit; the crystal oscillator of the USB part uses a CCHD-957 femtosecond clock; the analog part uses a Mondolfo film capacitor for tuning; the sound performance will be better A little more relaxed and lively.

SDA-6 is a high-performance DAC developed by our Singxer team. It uses XMOS’ latest xCORE-200 series chip XU208 as the USB Audio solution and uses AKM’s third-generation flagship DAC: AK4499 as the main chip for digital-to-analog conversion, AK4118 As a digital audio input receiving chip, STM32 is used as the control core of the whole machine, and Xilinx's large-scale FPGA is used as the clock system and digital audio stream processing. PCM supports up to 384Khz, DSD adopts native direct solution technology and supports up to DSD512.

The DAC chip adopts the latest AK4499 released by AKM in 2019; DSD adopts the native direct solution mode. The DSD digital stream does not pass through the internal digital filter and works in the NOS mode, which is fully in line with the design concept of HQPlayer.

It has a wealth of input and output interfaces, including standard USB2.0 input interface, SPDIF and BNC coaxial and AES balanced input, HDMI-I2S input interface, analog output including XLR balanced output and RCA single-ended output; all interfaces support DSD input.

SDA-6 supports external clock input, among which USB supports 10M clock input, and other interfaces support WCK input. In USB mode, it also supports 50 and 75-ohm switchable input impedance.



 Main technical features:

1. Self-developed adaptive clock system technology, built-in 4 independent ultra-low jitter audio crystal oscillators, equipped with a femtosecond-level local clock system for the USB part, the standard version of the crystal oscillator is AS-318B, and the high version is CCHD- 957.

2. High-performance digital-analog hybrid phase-locked loop, excellent clock synchronization recovery technology, can greatly filter the secondary PLL of external digital input jitter.

3. It adopts 4 channels of fully balanced and full DC discrete circuit output; among them, the high-end version adopts non-loop negative feedback output.

4. Large-scale FPGA for digital audio signal processing, self-developed second-generation algorithm, original multi-input channel isolation technology, to ensure the purity of each input signal.

5. Built-in 40 watt custom O-type transformer, output 4 independent power supply windings, up to 20 groups of distributed voltage stabilized circuits; among them, the reference power supply for AK4499 is the newly developed super low noise (as low as 0.5uV RMS) power supply system.

All versions support 115V and 230V AC voltage switching, and there is a switch inside.


Technical index:

Sampling rate supported by each input interface:

PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 352.8KHz, 384KHz
(USB and I2S support all sampling rates and S/PDIF supports up to 192KHz)

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: Up to 32 bit over USB and I2S 
                Up to 24 bit over S/PDIF



Electrical standards for each interface:

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

2. The SPDIF interface inputs standard S/PDIF signals, the input impedance is 75 ohms, and the AES input impedance is 110 ohms.

3. The power input is 115V/230V AC, and a 40-watt customized transformer is used for power supply.

4. I2S input is the LVDS level in the form of the HDMI interface, compatible with most front-end equipment.


Analog output performance:

Output level (0dBFS):
PCM: RCA single-ended output is 2.25V RMS, XLR balanced output is 4.5V RMS
DSD: RCA single-ended output is 1.8V RMS, XLR balanced output is 3.6V RMS
Output impedance: 22 ohms (RCA single-ended) / 45 ohms (XLR balanced)
Frequency response: 20-20kHz +/-0.1dB
S/N ratio: 131dB (20-22kHz A weighting)
Distortion characteristics:
THD+N (1kHz, 0dBFS) 0.00012% (-118db) at fs=44.1Khz (PCM, 20Hz-22kHz A weighting))
Dynamic response (1kHz, -60dBFS) 131dB (20Hz-22kHz A weighting)
Left and right channel separation >130dB @1kHz

Net Weight:2.7KG
Gross Weight:3.6KG
Accessories: A USB cable
A power cord
Infrared remote control
Because the high-end version requires manual adjustment and production, it takes more time to ship. The high-end version adopts a non-loop negative feedback full DC full-balanced discrete class-A output circuit; the crystal oscillator of the USB part uses a CCHD-957 femtosecond clock; the analog part uses a Mondolfo film capacitor for tuning; the sound performance will be better A little more relaxed and lively.

SDA-6 is a high-performance DAC developed by our Singxer team. It uses XMOS’ latest xCORE-200 series chip XU208 as the USB Audio solution and uses AKM’s third-generation flagship DAC: AK4499 as the main chip for digital-to-analog conversion, AK4118 As a digital audio input receiving chip, STM32 is used as the control core of the whole machine, and Xilinx's large-scale FPGA is used as the clock system and digital audio stream processing. PCM supports up to 384Khz, DSD adopts native direct solution technology and supports up to DSD512.

The DAC chip adopts the latest AK4499 released by AKM in 2019; DSD adopts the native direct solution mode. The DSD digital stream does not pass through the internal digital filter and works in the NOS mode, which is fully in line with the design concept of HQPlayer.

It has a wealth of input and output interfaces, including standard USB2.0 input interface, SPDIF and BNC coaxial and AES balanced input, HDMI-I2S input interface, analog output including XLR balanced output and RCA single-ended output; all interfaces support DSD input.

SDA-6 supports external clock input, among which USB supports 10M clock input, and other interfaces support WCK input. In USB mode, it also supports 50 and 75-ohm switchable input impedance.



 Main technical features:

1. Self-developed adaptive clock system technology, built-in 4 independent ultra-low jitter audio crystal oscillators, equipped with a femtosecond-level local clock system for the USB part, the standard version of the crystal oscillator is AS-318B, and the high version is CCHD- 957.

2. High-performance digital-analog hybrid phase-locked loop, excellent clock synchronization recovery technology, can greatly filter the secondary PLL of external digital input jitter.

3. It adopts 4 channels of fully balanced and full DC discrete circuit output; among them, the high-end version adopts non-loop negative feedback output.

4. Large-scale FPGA for digital audio signal processing, self-developed second-generation algorithm, original multi-input channel isolation technology, to ensure the purity of each input signal.

5. Built-in 40 watt custom O-type transformer, output 4 independent power supply windings, up to 20 groups of distributed voltage stabilized circuits; among them, the reference power supply for AK4499 is the newly developed super low noise (as low as 0.5uV RMS) power supply system.

All versions support 115V and 230V AC voltage switching, and there is a switch inside.


Technical index:

Sampling rate supported by each input interface:

PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 352.8KHz, 384KHz
(USB and I2S support all sampling rates and S/PDIF supports up to 192KHz)

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: Up to 32 bit over USB and I2S 
                Up to 24 bit over S/PDIF



Electrical standards for each interface:

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

2. The SPDIF interface inputs standard S/PDIF signals, the input impedance is 75 ohms, and the AES input impedance is 110 ohms.

3. The power input is 115V/230V AC, and a 40-watt customized transformer is used for power supply.

4. I2S input is the LVDS level in the form of the HDMI interface, compatible with most front-end equipment.


Analog output performance:

Output level (0dBFS):
PCM: RCA single-ended output is 2.25V RMS, XLR balanced output is 4.5V RMS
DSD: RCA single-ended output is 1.8V RMS, XLR balanced output is 3.6V RMS
Output impedance: 22 ohms (RCA single-ended) / 45 ohms (XLR balanced)
Frequency response: 20-20kHz +/-0.1dB
S/N ratio: 131dB (20-22kHz A weighting)
Distortion characteristics:
THD+N (1kHz, 0dBFS) 0.00012% (-118db) at fs=44.1Khz (PCM, 20Hz-22kHz A weighting))
Dynamic response (1kHz, -60dBFS) 131dB (20Hz-22kHz A weighting)
Left and right channel separation >130dB @1kHz

Net Weight:2.7KG
Gross Weight:3.6KG
Accessories: A USB cable
A power cord
Infrared remote control

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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.



PO boxes or APO/FPO

The ability to ship to PO boxes or an APO/FPO address depends on the item's weight. If an item weighs more than 9 pounds, we won’t be able to ship to these addresses because of our current courier agreements.

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:

Canada: 1 to 3 weeks from the date of shipping
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.



Easy 30-Day Return Policy

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.



Eligibility Conditions

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.



Exchanges

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Refunds & Credits

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.