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Small green circuit board with USB plug, 3.5mm jack and digital audio output

SMUGDESK

SMUGDESK PCM2704 USB DAC Audio Adapter

SKU CH-5JYN-GW5YW

Converts USB audio to 3.5mm analog and S/PDIF digital outputs using the PCM2704 chip for DIY sound projects

  • Classic PCM2704 chip delivers high-fidelity USB to analog conversion
  • Dual S/PDIF digital and 3.5mm analog outputs for flexible connectivity
  • USB bus-powered design eliminates need for external power supply
  • Bare PCB module suits DIY audio projects and chassis modifications
  • Plug-and-play on Windows with no extra driver installation

DIY USB DAC board

The SMUGDESK PCM2704 is a bare PCB audio adapter that adds external digital-to-analog conversion to a desktop PC via a single USB connection. It targets hobbyists who want to replace faulty onboard audio or build a custom sound module without an enclosure.

Dual S/PDIF and analog outputs

The board provides both a digital S/PDIF port for external amplifiers or high-end decoders and a 3.5mm jack for direct headphone or active speaker connection. Both outputs are active from the same USB stream, letting you switch between digital and analog paths without reconfiguring software.

Bus-powered bare PCB

Power comes entirely from the host USB port, so no separate supply or cable is needed in a chassis build. The exposed board layout suits internal mounting, project enclosures or direct soldering, while plug-and-play Windows recognition avoids driver hassle during assembly.

Highlights

  • Classic PCM2704 chip delivers high-fidelity USB to analog conversion
  • Dual S/PDIF digital and 3.5mm analog outputs for flexible connectivity
  • USB bus-powered design eliminates need for external power supply
  • Bare PCB module suits DIY audio projects and chassis modifications
  • Plug-and-play on Windows with no extra driver installation

Specifications

No published specifications for this item yet.

Questions about this item

Will the PCM2704 decoding chip need replacement after long use?

The PCM2704 chip is soldered on the bare PCB and designed for the module's lifetime; no user-serviceable parts are specified.

What limits continuous playback through the 3.5 mm jack?

USB bus power caps the output stage, so extended high-volume sessions may hit the port's current ceiling before the chip does.

How much heat or noise does the board produce when running all day?

The bare PCB draws only USB bus power with no fan or moving parts, so it runs silently and stays barely warm during all-day use.

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