Product introduction:

The SU-2 Digital Interface is a high-performance USB digital audio interface for our team''''''''''''''''''''''''''''''''s new developments, using the microprocessor of the latest ARM Cortex-M4 as the kernel as the main control of the USB data section.SU-2Independently developed ultra-low jitter clock system（Accusilicon''''''''''''''''''''''''''''''''s AS-318B series, reaches the femtosecond level ultra-low jitter）, Large-capacity FPGA as Digital Audio data processing core, has standardUSB2.0Input interface, rich output interface, including XLR balance output AES, coaxialRCA and BNC,HDMI socket outputI2SInterface, perfect main clock and word clock（WCLK）Output .SU-2 supports external 10MHz clock input, using common 50 ohm input impedance design.

 SU-2 is not only a USB interface, and can also be used as a stand-alone main clock product.

 1. When used as a stand-alone master clock, 44.1k-384K word clock can be output, or the 22.5792 MHz-49.152MHz master clock is output. (When you don''''''''''''''''''''''''''''''''t pick USB, you will be used by default as the main clock device)

 2. When using an external 10MHz clock input, it can also be used as a frequency converter; support 10MHz to switch toThe word clock of 44.1k-384k or output 22.5792 MHz-49.152MHz main clock.

  SU-2It is the new architecture USB interface we have developed, used to replace the original SU-1; PCM sampling rate supports up to PCM 768K, and DSD supports to DSD1024. Using large FPGAs as the core of the operation, we put the partial FPGA algorithm technology of the flagship interface SU-6 into SU-2; it is positioned in the medium and high-end interface, mainly using three unique technologies:

     1, all isolation technology（Ground isolation）, Use 150Mbps full isolation chip, can completely isolate interference from the PC;

     2. Source synchronization techniques and FPGA plastic surgery, re-shaping the I2S signal after isolation; thereby eliminating the plus jitter brought by the isolation chip;

     3, self-developed clock system, adoptionAccusilicon''''''''''''''''''''''''''''''''s high-performance crystal, low phase noise, low jitter; you can also choose an external 10MHz clock, support a variety of atomic clocks, constant temperature crystal vibration, GPDSO input.

This product supports two AC power voltages, 230V and 115V, and the default in China is 230V. If you need 115V, please consult again.

The price of Su-2 is not shipped, the default is smooth, the freight is harvested.

Regarding the seven days of no reason to return: When the product quality problem does not remove the package, it is necessary to return for seven days. If you remove the packaging, you can''''''''''''''''''''''''''''''''t return it in seven days. Thank you for your understanding.

• Links from drivers and related materials: https://pan.baidu.com/s/1pk7uaw7

  Update driver in June 2019, the latest version is V4.67

• The latest driver supports DSD1024 and DSD Native mode.

  Password: Please consult the shopkeeper after purchase

  If the network disk can''''''''''''''''''''''''''''''''t be downloaded, you can send email: Leter15@foxmail.com

  If you can not download these files,

  Please send an email to us: leter15@foxmail.com

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• （Standard accessories are a USB cable, the default delivery is no power line）
• Below is a chassis:

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  Technical indicators:

  The sample rate supported by each output interface:

   

  PCM: 44.1KHz,48KHz,88.2KHz,96KHz,

  176.4KHz,192KHz,352.8KHz,384KHz,705.6KHz,768KHz

  [Where I2S OUT supports all sampling rates, S / PDIF supports 384kHz, DOP128]

• 2.8 MHz (DSD64) -DOP,native

• 5.6 MHz (DSD128) -DOP,native

  11.2 MHz (DSD256) -DOP,native

  22.5792 MHz (DSD512)- DOP,native

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  45.1584 MHz (DSD1024) -native

   

  I2S OUTSupport allDSDFormat,S/PDIFandAES/EBUsupportDSD128 DOPmodel]

  Bit wide: up to 32 Bit over I2S OUTPUT

  Maximum 24 bit over s / pdif

   

  Each interface electrical standard:

  1, USB input socket is the standard USB-B master seat, USB power supply range 4.5V-5.1V;

  2, the RCA interface output standard S / PDIF signal, the level is 550mV (connected to the standard load), the output impedance is 75 ohms;

  3, the power input is 115V / 230V communication, and the internal use of TALEMA import transformers is powered.

   

  

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  plan the details:

  1. Implementing the design concept of the vocal mystery, pay attention to the design of the power supply circuit, using high performance, low noise, and LDO with rapid response as the main power supply. The entire board uses a multi-channel independent LDO power supply, of which the clock part even uses ADI''''''''''''''''''''''''''''''''s ultra-low noise LDO to ensure the performance of the output.

  2, the PCB motherboard is designed with a 4-layer board to ensure that there is a complete floor planar and power layer, which uses high-speed digital design methods to ensure signal integrity and power integrity of the entire board. Special processing of the clock signal is carried out, using the package design and precise impedance control, thereby ensuring the signal quality of the clock and improves its anti-interference ability. The input and output signals follow standard design, especially the USB high-speed signal adopts 90 ohm differential impedance control.

   

  System compatibility:
  1, Windows 7, Windows 8, Windows 10; 32/64 bit, you need to install dedicated drivers
  2, Native MacOS 10.6 and Later, use the system comes with drive
  3, Native Linux with uac2 compliant kernel, use the system to own the drive,（Test over Ubuntu and Daphile systems, based on Intel X86 platform）
  4, Android OS 4.2 and above, the device needs to support OTG function, in general, Android 9.0 or more system is the default support, and 9.0 or less recommended with specialized player use.
   

  The I2S interface is output by HDMI socket:

  1. LVDS differential signal of 3.3V;

  2.DSD ON signal, 5V power supply（Small current）The internal CPLD of the MUTE signal has been processed, and the MUTE signal will not be required;

  The 3.DSD ON signal can be defined by itself, and the DSD ON signal can be arbitrarily output to the PIN13, 14, 15, 16 pins of the socket.

  

  Flexible I2S and Clock Output Configuration:

  1. Switch 1-4 corresponds to the PIN13-16 feet of the HDMI socket. Pull the on position, it means that the HDMI PIN has the function of DSD_ON.

  2. Switches 5 and 6 are patterns of the configuration clock output:
   The switch 5 outputs MCLK when OFF, the clock output WCK is output at ON;
   Switch 6 Configure the frequency of MCLK. When OFF is 22.5792m / 24.576m, ON is 45.1584m / 49.152m;
   The configuration of the switch 6 is valid for CLK OUT, RJ45-I2S, HDMI-I2S.

  3. Switch 7 can separately set the left and right channels in the DSD mode in the I2S signal.

  4. Switch 8 can set the line sequence of the I2S signal; when OFF, PIN4 is BCLK +, and PIN6 is BCLK-;

  4. Switch 9 can set the line sequence in the I2S signal; when OFF, PIN7 is LrClk +, PIN9 is LrClk-;

  4. Switch 10 can set the line sequence of the I2S signal; when OFF, PIN1 is DATA +, PIN3 is DATA-;

   

   

  

   Below is a quantified version of the chassis, this switch can be configured on the back of the chassis.
   All the defaults are all OFF.

  SU-2 can be configured via SW switch to accommodate different I2S standards.

  But according to what we know, HDMI-I2S of each manufacturer around the world is different. For most manufacturers, HDMI-I2S is a private agreement.

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  So, sorry, SU-2 impossible to adapt to all HDMI-I2S machines, so they do not accept returns because I2S interface is not compatible.

  However, we can now give HDMI-I2S of several different manufacturers below. In these manufacturers, a part of the DAC is not problematic.

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  Chassis size and packaging:

  The length of the chassis is high: 234mm * 170mm * 46mm, does not include the height of the machine and the protruding portion of the chassis rear connector.

  Single machine weight: 1.8kg.

  Carton packaging is high: 350mm * 230mm * 110mm.

  Shipping packaging weight: 2.3kg

  Accessories: a USB cable.

  （Standard accessories is a USB cable and a power cord）

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  Description of the comparison of sound quality:

         Usually, the shopkeeper will not say what style is of this product, how is the sound, because these evaluations are personalized. These evaluations on sound details are left to users. After all, everyone''''''''''''''''''''''''''''''''s equipment is different, and listening preferences are different. The equipment is a certain price. The quality is not bad, mainly in the tone.

         In addition, we do not recommend the offside PK between the devices. After all, the price difference is too big, and PK is meaningless. But our products, in the case of the same price, must be very competitive, or it is also a cost-effective product. Quoted a cow said: a penny does not necessarily bought a stock, but a stock must have a penny to buy.

  About sound quality and tone:

       The sound quality can be interpreted as the quality, quality, etc. of the replay sound, usually, can be reacted by the audio test equipment. The products we launched are tested through the instrument. This can be relieved. If the product has quality problems, it is possible to apply for return. If it is human damage and modification（Including modified products, welding, scratching, etc.）It is not within the range of returning. But you can still enjoy our warranty and service.

   

           The sound of the sound is different, and everyone''''''''''''''''''''''''''''''''s preferences are different, soUnder normal circumstances, we do not accept that the sound is not satisfied with the return. If you need to listen to the service, you can contact the shopkeeper. We will also launch some free or paid audition activities, please pay attention.