Singxer
Singxer F1 Digital Interface Board SPDIF RCA XU208 Chip
Best digital interface for audiophiles seeking pristine, noise-free signal conversion.
Experience superior digital audio with the Singxer F-1, a high-performance USB interface powered by the advanced XMOS XU208 chip. This interface delivers exceptional clarity and precision, boasting ultra-low jitter thanks to custom femtosecond clocks and CPLD-based signal reshaping. It ensures a clean signal path with full isolation from PC noise and a robust 4-layer PCB design. Offering versatile connectivity, the F-1 supports high-resolution audio up to 32-bit/384kHz PCM and DSD256 via I2S, along with S/PDIF outputs for broad compatibility.
$170.99
Owner Satisfaction
4.6
/ 5
Category Rank
111
/ 439
#111 in Audio Cards & Adapters
Price vs Category Average
-85%
Below average
USB Input
4.55.1
/ Standard USB-B type female, V-V supply
Who it's for
- Audiophiles seeking precise, low-jitter digital audio transmission
- Budget-conscious listeners upgrading from standard onboard USB inputs
- High-resolution music collectors needing native DSD256 and PCM support
Who should skip it
- Advanced users needing versatile AES/EBU or flexible I2S connectivity
- DIY beginners lacking the tools to build a custom enclosure
- Purists requiring clean, isolated power for a silent noise floor
Performance breakdown
Jitter suppression
Femtosecond clocks deliver a remarkably stable and precise digital signal.
Noise isolation
Advanced circuit design effectively shields audio from disruptive computer interference.
Resolution support
Handles high-resolution PCM and DSD files with impressive technical headroom.
Build integrity
Four-layer PCB construction ensures a robust and reliable signal path.
System compatibility
Broad OS support and standard pinouts make integration into existing setups simple.
Power efficiency
Dual LDO power supply keeps the internal signal clean and stable.
Key Specs
USB Input
Standard USB-B type female, 4.5V-5.1V supply
I2S Output Bit Depth
32 bit
S/PDIF Output Bit Depth
24 bit
Maximum PCM Sample Rate
384kHz (I2S) / 192kHz (S/PDIF)
Maximum DSD Rate
DSD256 (I2S)
PCB Structure
4-layer circuit board design
Clocking
Custom CRYSTEK CCHD 575 series audio crystal
RCA Output Level
550mV into standard load, 75 ohms impedance
Features
- Powered by XMOS XU208 USB chip
- Ultra-low jitter with femtosecond clock
- Full isolation blocks PC noise
- I2S signal re-shaping technology
- Independent development for quality
- Dual independent LDO power supply
- Firmware upgradeable for future use
- Compatible with Amanero pinout
What customers say
The Singxer F1 Digital Interface Board is highly praised for delivering exceptional value and superior sound quality. Users consistently report a noticeable upgrade over standard computer USB outputs, noting cleaner audio, better detail, and improved dynamics. Its primary strength is providing extremely low jitter SPDIF output, maximizing connected DAC performance. Reviewers frequently label it a giant killer because its fidelity rivals much more expensive units. While the physical design is basic, the rock solid driver stability, especially ASIO performance on Windows, ensures a reliable, high fidelity experience. The F1 is an essential, economical choice for optimizing digital audio chains.
Know before you buy
No, the F-1 is bus-powered via the USB connection. It utilizes dual independent LDO power supplies internally to ensure clean, stable power for the audio circuitry.
The XU208 chip provides high-speed, low-latency USB audio processing. It allows the interface to handle high-resolution files, including 32-bit/384kHz PCM and DSD256, with significantly reduced jitter compared to standard USB controllers.
The F-1 is highly versatile, offering both I2S and S/PDIF (RCA) outputs. As long as your DAC supports these inputs, it will be compatible, though please note that I2S pinouts can vary between manufacturers.
The board features full isolation technology that physically separates the USB input from the audio output stage. This prevents high-frequency noise from your PC's power supply and data lines from contaminating your audio signal.
The Singxer F-1 is compatible with Windows, macOS, and Linux. While Windows users will need to install the appropriate drivers, macOS and Linux systems generally support the device natively.
I2S transmits audio data and clock signals separately, which avoids the encoding and decoding overhead required by S/PDIF. This allows for higher resolution support, specifically up to DSD256 and 384kHz PCM.
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$171