GUSTARD U16 ES8620 USB Interface
World Free Shipping & Returns
A 128MB SDRAM is used as the system buffer and digital audio processing FIFO.
Most of the space is used for internal scheduling of the USB audio interface IC, and the redundant space is reserved as much as possible to ensure that other business logic operations other than the USB audio interface function in the main IC do not interfere with the digital audio processing flow.
In order to achieve optimal digital audio performance, the actual digital audio processing FIFO capacity is reduced to a minimum to ensure the lowest digital domain delay and digital output jitter performance;
To ensure the highest quality digital audio signals and the best clock jitter performance, the U16 uses up to three FPGAs to implement USB audio interface clock management and the audio clock frequency synthesizers in the external 10M clock circuit.
This part of the circuit is powered independently, to avoid mutual interference of the internal wiring of the FPGA;
In the core circuit of the USB audio interface, an FPGA is used to implement the USB audio interface IC running in the Slave mode.That is, the USB audio interface IC receives the audio clock signal generated by the clock management FPGA and outputs only the digital audio data signal, thereby minimizing the digital signal interference introduced during the USB transmission process;
The U16 has an external 10M clock input*, and the user can choose to access an external high-quality 10M clock reference source to further improve the sound quality.
* For security reasons, U16 does not automatically switch the clock source after accessing the external 10M clock. You must manually select the internal and external clock sources.
The audio clock synthesis circuit in the external 10M clock circuit uses two FPGAs corresponding to the audio main clock frequency synthesizer of the 44.1KHz and 48KHz base frequencies.
This design, on the one hand, avoids the crosstalk of the internal wiring of the FPGA; on the other hand, it also uses the relevant resources in the FPGA chip as efficiently as possible.
The frequency accuracy and jitter performance of the final synthesized audio main clock signal of this circuit have reached the limit performance level of the Current design;
The local audio clock source uses a pair of femtosecond clocks. This unit uses two ACCUSILICON AS318-B ultra low phase noise crystals as the local audio clock source, and the RMS jitter is as low as 88 femtoseconds (10Hz-1MHz).
In addition to the standard digital audio outputs, the U16 also has a flexible BNC output whose output signal can be freely selected between Word Clock or S/PDIF.
The U16's built-in linear regulated power supply uses an audio-specific toroidal transformer.
USB port: USB Type-B female port, support USB2.0
10M BNC input: input impedance 50 Ohm, 0dBm-16dBm
RCA coaxial S/PDIF port: output impedance 75 Ohm, output level 500mVpp @75 Ohm load
XLR AES3 port: output impedance 110 Ohm, output level 2.1Vpp @110 Ohm load
OPTICAL TOSLINK port: 24bit 44.1k-192k /DOP64
Multi-function BNC port:
output impedance 75 Ohm, S/PDIF output level：750mVpp @75 Ohm load
S/PDIF support specification (when S/P OUT is selected): 24bit 44.1k-384k/DOP64-128
Word Clock output level：3.3Vpp MAX @ noload
Word Clock output frequency (when WCK OUT is selected): PCM: 44.1k-768k.
IIS over HDMI interface (non-standard HDMI interface):
differential I2S signal with LVDS output level,
PCM: 32bit 44.1k-768k, DSD: 2.82M-22.57M (DSD64-DSD512)
Windows driver supports Windows 7 (SP1 and newer); Windows 8; Windows 10
No additional drivers required for Mac OS and Linux
All-aluminum chassis with sandblasted surface, available in silver (white) and black.
AC power supply: AC 115V/230V 50/60Hz
Power consumption: <15W
Dimensions: width 220mm * height 50mm * depth 170mm (without protruding parts)
Packed size: length 185mm * width 170mm * height 85mm
Packed weight: 2.5KG
No additional drivers required for Mac OS and Linux
Worldwide Free Shipping on SHENZHENAUDIO, Please allow 1-3 business days for conduct Quality Control in order to ensure the products quality.
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.
Which Couriers To Use?
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.
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.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary. Please allow 3-5 business days for mail-in exchanges to be processed.
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.
ShippingTo return your product, you should mail your product to: 4F 405, Building F, No.2 Shangxue Science and Technology North, Bantian Street, Longgang Dist, ShenZhen, 518129 Guangdong, China
If you’ve done all of this and you still have not received your refund yet, please contact us at email@example.com.