The Singxer SU-6 is a next-generation digital interface that delivers excellent audio performance through a high-end component-based design. These include an XMOS XU208 USB interface and a Xilinx FPGA. Two CCHD-957 femtosecond clocks provide an extremely low jitter level.

The SU-6 also has a particularly complete set of connectors, especially at the output. While it has a single input in USB-B 2.0 format, the output of the SU-6 includes AES/EBU, Coaxial, BNC and Optical SPDIF as well as I2S via RJ45 and HDMI. A MCLK/WCK output is also available to allow another device to use the clock signal from the SU-6.

The interface also supports high sample rates, allowing you to enjoy your PCM files up to 32bit 384kHz and DSD512 (via I2S).

This SU-6 from Singxer mainly integrates 4 important novelties compared to the other models of the range:

• Integrated CPLD with pre-shaping technology. Source synchronization technology via FPGA to correct the I2S signal and eliminate jitter.
• New FPGA algorithm. The FIFO buffer buffers the data before output, and the output is re-encoded by the FPGA. The Coaxial output can thus support streams up to PCM 384kHz and DSD DoP128.
• Use of Crystek CCHD-957 femtosecond oscillators with constant-temperature system and ultra-low noise super-capacitor power supply technology. Allows to significantly improve the stability of the clock signal.
• All circuits adopt synchronous clock design, and the USB clock is synthesized by a PLL derived from the femtosecond clock.

The SU-6's power supply circuitry is particularly neat, using super-capacitors and 6 LDO low noise, fast response. The digital audio circuitry and clock system use independent LDOs to ensure a clean signal.