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Small blue rectangular USB-C DAC with 3.5mm and 4.4mm headphone jacks

BFKK

BFKK FC4 Portable DAC Headphone Amplifier Blue

SKU CH-3H9Q-FZ2VP

Portable DAC with dual ES9219 chips, 4.4 mm and 3.5 mm outputs, 340 mW at 32 ohms, PCM 768 kHz and DSD256 support, plus MQA 16X decoding for Android, iOS, Mac and Windows

  • ColorBlue
  • Dual ES9219 DAC chips deliver precise decoding up to PCM 768 kHz and DSD 256
  • Independent FPGA reclocking with dual crystal oscillators reduces jitter for cleaner signal
  • 340 mW per channel into 32 Ω drives demanding headphones from a dongle
  • Full MQA 16× unfolding restores master-quality detail from streaming files
  • Driver-free plug-and-play on Android, iOS, Mac and Windows 10+ with 4.4 mm and 3.5 mm outputs

Portable DAC Headphone Amplifier

The BFKK FC4 is a compact USB dongle that adds high-resolution digital-to-analogue conversion and headphone amplification to Android, iOS, Mac and Windows 10 or later devices. It targets listeners who want better sound quality from a phone or laptop without carrying a separate player.

Dual ES9219 Chips and FPGA Reclocking

Two ES9219 DAC chips work with an independent FPGA-based dual crystal oscillator to reclock the incoming signal and reduce jitter. The unit draws power directly from the host device so no battery charging is needed, and driver-free operation begins as soon as it is plugged in.

4.4 mm and 3.5 mm Outputs with High Driving Power

Balanced 4.4 mm and single-ended 3.5 mm jacks deliver 340 mW per channel into 32 ohms, letting the amplifier drive most in-ear monitors and many full-size headphones. Decoding supports PCM up to 768 kHz 32-bit and native DSD256, plus full MQA 16X unfolding for compatible streams.

Highlights

  • Dual ES9219 DAC chips deliver precise decoding up to PCM 768 kHz and DSD 256
  • Independent FPGA reclocking with dual crystal oscillators reduces jitter for cleaner signal
  • 340 mW per channel into 32 Ω drives demanding headphones from a dongle
  • Full MQA 16× unfolding restores master-quality detail from streaming files
  • Driver-free plug-and-play on Android, iOS, Mac and Windows 10+ with 4.4 mm and 3.5 mm outputs

Specifications

ColorBlue

Questions about this item

What is the maximum driving power at 32 ohms?

The FC4 delivers 340 mW + 340 mW at 32 ohms, providing high driving power for a USB dongle.

How much heat or noise does the unit produce during all-day use?

The device has no fan or moving parts, so it runs silently and generates only modest warmth during continuous operation.

Which cable is required to connect this to an iPhone with a Lightning port?

A Lightning to USB-C OTG cable must be purchased separately for iOS devices with a Lightning connector.

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