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Description
Singxer SU-6 XMOS XU208 CPLD Femtosecond Clock USB Digital InterfaceProduct introduction: The SU 6 digital interface is a new generation of high performance USB digital audio interface. It uses XMOS' latest xCORE 200 series and Xilinx's high performance large scale PGA chip. The SU 6 is a digital interface using a thermostat level clock system. Crystek's two CCHD 957 femtosecond crystal oscillators provide a solid foundation for the superior audio signal quality of the SU 6 output. The SU 6 digital interface uses a
Product introduction:The SU-6 digital interface is a new generation of high-performance USB digital audio interface. It uses XMOS' latest xCORE-200 series and Xilinx's high-performance large-scale PGA chip. The SU-6 is a digital interface using a thermostat-level clock system. Crystek's two CCHD-957 femtosecond crystal oscillators provide a solid foundation for the superior audio signal quality of the SU-6 output. The SU-6 digital interface uses a standard USB2.0 input interface, while the SU-6 has a rich output interface, including S/PDI for fiber/coaxial RCA and BNC outputs, AES/EBU for XLR balanced output, RJ45 and HDMI interfaces. Output I2S (including DSD ON signal), clock output supports MCLK main clock and WCLK word clock. The power system design was optimized and the audio section was powered by a 7.5F (7.5 million uf) supercapacitor.
SU-6 is newly developed USB interface, which is positioned at the high-end interface. Compared with previous products, we mainly use the following four new self-developed technologies:
1, built-in CPLD pre-shaping technology, FPGA-based source synchronization technology re-shaping the isolated I2S signal, thus eliminating the additive jitter caused by the isolation chip.
2, the newly designed FPGA algorithm, built-in FIFO buffers the data and then outputs, SPDIF output is re-encoded by FPGA, so that the coaxial output can support PCM 384K and DSD DOP128 at the highest.
3, using CRYSTEK's CCHD-957 high-performance femtosecond crystal oscillator, with the self-developed constant temperature system and ultra-low noise super capacitor power supply system, further improve the short-stability performance of the clock.
4. Original single clock system, all circuits of the whole machine adopt synchronous clock design, in which USB clock is synthesized by PLL derived from femtosecond clock.
Technical indicators:
Sample rate supported by each output interface:
PCM: 44.1KHz, 48KHz, 88.2KHz, 96KHz,176.4KHz, 192KHz, 352.8KHz, 384KHz
DSD: 2.8 MHz (DSD64) - DoP, native
5.6 MHz (DSD128) - DoP, native
11.2 MHz (DSD256) - DoP, native
22.5 MHz (DSD512) - native
Bit width: up to 32 bit over I2S output
Up to 24 bit over S/PDI, AES/EBU
Electrical standards for each interface:
1, USB input socket is a standard USB-B type female socket, USB power supply range is 4.5V-5.1V;
2, DC POWER input socket uses DC2.1 socket, supports 7.5V-9V DC input (for fast charging of super capacitor, power supply requirement is 3A).
3, BNC interface and RCA interface output standard S / PDI signal, the level is 550mV (connected to standard load), the output impedance is 75 ohms;
4, XLR interface output standard AES / EBU signal, the level is 3.3V (connected to standard load), the output impedance is 110 ohms;
5, the word clock (WCLK) output uses BNC interface, the level is TTL (no load), the output impedance is 75 ohms;
The 6, 2 HDMI-I2S signals are output through the HDMI socket. The output four signals include MCLK, BCLK, LRCLK, and SDATA signals. The standard LVDS differential level is used, and the impedance is controlled at 100 ohms. The PIN13-15 of the HDMI socket is the DSD_ON signal, the high level is the I2S working in the DSD mode, the level is LVTTL; the PIN18 is the 5V weak power output (the output current is less than 20ma), which can be used as the interface plug-in indication; 2 output The I2S line sequence is the same.
7, RJ45-I2S output I2S signal is CMOS (5V) single-ended signal, low-impedance output, the output of four signals including MCLK, BCLK, LRCLK, SDATA signal.
8, the optical fiber port outputs the standard optical signal.
Design details:
1. Implement the design concept of electric power as the mother of sound, pay attention to the design of power circuit, adopt external DC input, built-in super capacitor power supply, with high performance, low noise and fast response LDO. The whole board is powered by up to 6 independent LDOs. The digital audio board is powered by a secondary LDO. The clock part even uses LT's ultra-low noise LDO, which lays a solid foundation for ensuring the ultimate performance of the output.
2, in order to ensure excellent electrical transmission performance, XLR sockets are made of Swiss Neutrik products, USB-B sockets are made of TE, and enthusiast BNC and RCA coaxial sockets are made for Taiwanese manufacturers. Even the fuses are selected from the United States. Litteluse model.
3. The audio board is designed with a 4-layer board to ensure a complete ground plane and power plane. High-speed digital design is used to ensure signal integrity and power integrity of the board. Special processing of the clock signal, using packet design and accurate impedance control, to ensure the signal quality of the clock and improve its anti-interference ability.
4, input and output signals are in accordance with the standard design, especially the USB high-speed signal uses 90 ohm impedance control, also built-in anti-static TVS protection circuit; I2S signal uses LVDS differential level standard, impedance control is 100 ohms, 4 outputs are used A separate LVDS driver.
System compatibility:
1, Windows 7, Windows 8, Windows 10; 32/64 bit, need to install a dedicated driver
2, Native MacOS 10.6 and later, using the system comes with a driver
3, Native Linux with UAC2 compliant kernel, using the system's own driver, (tested on 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, the Android 5.0 system is supported by default, and the following 5.0 recommendations are used with a dedicated player.
HDMI -I2S interface output:
1. LVDS differential signal with a level of 3.3V;
2.DSD ON signal, 5V power supply (small current), the internal PGA of the MUTE signal has been processed, and the MUTE signal will not need to be output;
3. The DSD ON signal can be defined by itself. The DSD ON signal can be arbitrarily output to the PIN13, 14, 15, and 16 pins of the socket.
4. The phase of PIN1-3 and PIN7-9 is adjustable, and the user can configure the phase of the two pairs of outputs through one switch.
Flexible I2S and clock configuration:
1. Switch 1-4 corresponds to the PIN13-16 pin of the HDMI socket. When it is pulled to the ON position, it means that the PIN pin has the output function of the DSD_ON signal;
2. Switches 5 and 6 are modes for configuring the clock output:
When the switch 5 is at O, the clock outputs MCLK, and when it is ON, the clock outputs WCK;
Switch 6 configures the frequency of MCLK, which is 22.5792M/24.576M for O and 45.1584M/49.152M for ON.
The configuration of switch 6 is valid for CLK OUT, RJ45-I2S, and HDMI-I2S.
3. The switch 7 can separately set the left and right channels in the DSD mode of the I2S signal.
4. Switch 8 can set the line sequence of BCLK in I2S signal; when O, PIN4 is BCLK+, PIN6 is BCLK-;
5. Switch 9 can set the line sequence of LRCLK in I2S signal; when O, PIN7 is LRCLK+, PIN9 is LRCLK-;
6. Switch 10 can set the line sequence of DATA in I2S signal; when O, PIN1 is DATA+, PIN3 is DATA-;
Note: Coaxial, optical fiber, AES/EBU output is not affected by the above code switch; RJ45-I2S wire sequence is fixed, need to adapt to different interfaces, you need to customize the network cable.
Chassis size and packaging:
The length and width of the chassis: 238MM*170MM*46MM, excluding the height of the feet and the protruding part of the connector behind the chassis.
The weight of a single machine is about 1.6KG.
The length and width of the carton packaging: 350MM*230MM*110MM.
Package weight: about 2.0KG
Accessories:
USB cable*1, power adapter (commonly used, AC100V-240V)*1, power cord*1
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 3
Missing items
Color: Sky Blue, Size: 16
Was missing the tie that is supposed to come with it and it looked like it was tried on and thrown back in the bag. The sleeve to the jacket were rolled up.
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Reviewed in the United States on December 7, 2025
★★★★★ 5
Excellent Quality, Great Value, Great Look. Highly Recommend
Very well-made, there are some minor imperfections in the cuff sewing that aren't really noticeable when on. Liner is quality, color is spot on, and it fits true to size. If you're in the market for a toddler blazer and pants, you can't go wrong with this one in terms of quality, price, and the cut is perfect for a very polished look.
There were a few loose strings to be clipped, but everything was correctly sewn and well. None of them affected the seam strength. The pants have a button and elastic on the waistband to make adjusting the waist size easier.
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Reviewed in the United States on November 14, 2025
★★★★★ 5
Great boys slim fit suit for weddings, church, or special events
Color: Medium Grey, Size: 12
Great kids suit. Comes with a jacket, pants, and tie. Does not have a shirt. Fits as expected. Classic cut on the lapels. Great quality materials. Well made pants and jacket. The color is consistent without any fade or dark spots that can happen with lower quality fabrics. Looks great on. My son loves it. Says it is not restrictive, he can move easily in it. Highly recommend for church, special events, weddings, etc.
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Reviewed in the United States on October 22, 2025
★★★★★ 5
Nice high-quality, light weight suit for a tween!
Color: Navy Blue, Size: 10
This is such an attractive suit for a tween boy! My son loves dressing up, and this is his new favorite suit. He really likes the double-breasted style and the light weight of the fabric so that it isn't too hot. The tie that came with it gives major Harry Potter vibes which we weren't expecting, but he has lots of other ties that he also enjoys pairing with it. The size seems right, and it fits him well. He says it is very comfortable. I'm happy with the quality and the navy color.
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Reviewed in the United States on October 14, 2025
★★★★★ 5
Stylish and great value!
Color: Medium Grey, Size: 14
This grey suit was a great find for a school ceremony and will definitely be used again. The neutral color makes it easy to pair with different shirts and ties, and it has a modern, clean-cut look. The jacket and pants fit nicely after a quick press, and the quality was better than I expected for the price. It lost a star only because the waist on the pants needed a slight adjustment, but overall, we’re very happy with it!
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Reviewed in the United States on October 10, 2025