Singxer SDA-6 PRO2 / PRO 2 Dual AK4499EX Digital to Analog Convertor (DAC)

Features:-
>New-Generation AK4191+Dual AK4499EX DAC chipset.
>XMOS XU316 USB Processor.
>Decodes 32bit/768kHz PCM and Native DSD512.
>Optimized Ultra-Low Noise Power Supply System.
>Digital Pre-Amp Function.
>Two-Level Gain Modes.
>OLED Display Screen.
>External 10M Clock Input.
>Self-Developed Adaptive Clock System.
>High-performance digital-analogue Hybrid Phase-Locked Loop.
>4-Way Fully Balanced Class A Discrete Output Circuit.
>Large FPGA For Signal Processing.
>Built-in 40-watt Customized O-Type Transformer.
>115V and 230V AC Voltage Support With Internal Toggle Switch.
Singxer SDA-6 Pro 2 is the latest flagship DAC developed with AKM’s new-generation AK4191+dual AK4499EX DAC chips and a custom-developed FPGA signal processing architecture. Singxer has optimized the internals of the SDA-6 Pro 2 to achieve class-leading performance promising quality output with ultra-low distortion and high SNR performance. The SDA6 Pro 2 supports native DSD and 32-bit PCM audio signals!!
New-Generation AKM DAC Chipset:-
Enjoy amazing sound signal decoding performance with a rich, velvety AKM in-house sound. The Singxer SDA6 Pro 2 comes equipped with a new-gen AK4191+Dual AK4499EX DAC chipset. This dual DAC arrangement delivers quality output by providing a natural tone, exquisite details, ultra-clear background, and low distortion performance. The output has amazing dynamics and high SNR performance.
Upgraded XMOS USB Processor Chipset:-
Singxer has upgraded the USB processor chip on the SDA6 Pro 2. It now comes with an XMOS XU316 16-core 3rd generation processor that enables smooth sound signal processing supporting up to 32-bit/76kHz PCM and native DSD512 audio signals. The SDA 6 Pro 2 is a true flagship-level performer in terms of USB Processing and overall performance.
Specially Developed Large-Scale FPGA Architecture:-
In order to achieve smooth digital audio signal processing, SDA-6 Pro 2 features a specially optimized FPGA architecture. It adopts self-developed third-gen algorithms with original multi-input channel isolation technology to ensure the purity of each input mode. Singxer SDA-6 Pro 2 features a high-performance digital-analog hybrid Phase-Locked Loop, that provides excellent clock synchronization recovery technology. It significantly improves the performance by filtering external digital input jitter secondary PLL.
Self-Developed Low-Jitter Clock Architecture:-
Singxer SDA-6 Pro 2 features a self-developed adaptive clock system technology. The DAC has a built-in 4-way independent ultra-low jitter crystal that is configured using a femtosecond clock system for the USB part. The clock architecture is embedded with Singxer’s self-developed thermostat technology to maintain a constant temperature. The SDA-6 Pro 2 also supports external 10M clock input for the USB interface while the other interfaces use WCK input.
Consistent Performance With Premium Power Supply:-
Singxer has a built-in 40-watt customized O-type transformer. The output of the four independent power supply winds up to 20 groups of distributed voltage regulator lines. Both the digital and the analog sections get a proper supply of power ensuring consistent performance in any given scenario. 
Here is the test data for the production version of the SDA-6 PRO, based on the APX555: –