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Red aluminium desktop DAC and headphone amplifier with front 6.35mm and 4.4mm outputs

FiiO

FiiO K11 R2R DAC Headphone Amplifier Red

SKU CH-SJAB-D4CF9

Desktop R2R DAC and headphone amplifier with 6.35 mm and 4.4 mm outputs, 1300 mW power, and 384 kHz / 24-bit DSD256 support

  • TypeAudio Amplifier
  • Full R2R DAC architecture delivers authentic sound quality
  • NOS and OS modes preserve pure or upsampled audio detail
  • 1300 mW output drives demanding headphones with authority
  • 35 mm and balanced 4.4 mm outputs suit any headphone
  • 384 kHz 24-bit DSD256 support handles high-resolution files

FiiO K11 R2R Desktop DAC Amplifier

The FiiO K11 R2R is a desktop DAC and headphone amplifier built around a fully differential complementary 24-bit R2R resistor ladder architecture. It connects to computers, smartphones, tablets and HiFi players to improve audio quality through decoding and amplification. A compact aluminium alloy body keeps the workspace tidy while delivering 1300mW of power.

Suited to listeners who want R2R sound on a desktop

This unit suits users who value the distinctive character of a resistor ladder DAC and need both 6.35mm and balanced 4.4mm headphone outputs. It also provides RCA, coaxial and optical connections for integration with existing equipment. Buyers requiring wireless streaming or battery-powered portable use should consider other options.

24-bit R2R ladder with NOS and OS modes

The core specification is the fully differential complementary 24-bit R2R ladder DAC that supports both Non-OverSampling and OverSampling modes. NOS preserves the original sampling rate for a pure presentation while OS upsamples globally to 384kHz for increased detail. DSD256 support is also included.

Highlights

  • Full R2R DAC architecture delivers authentic sound quality
  • NOS and OS modes preserve pure or upsampled audio detail
  • 1300 mW output drives demanding headphones with authority
  • 35 mm and balanced 4.4 mm outputs suit any headphone
  • 384 kHz 24-bit DSD256 support handles high-resolution files

Specifications

TypeAudio Amplifier

Questions about this item

Should I pick the 6.35 mm or the 4.4 mm balanced output for my headphones?

Use the 4.4 mm balanced jack when your headphones have a matching cable — it delivers the full 1300 mW and lower crosstalk. The 6.35 mm single-ended jack is there for standard headphones and works well, but power and channel separation are lower.

What does 1300 mW mean when I plug in my headphones?

It is the maximum clean power the amplifier can supply into a typical load. For sensitive in-ears you will use only a fraction; for demanding 300 Ω cans it provides enough headroom for loud peaks without clipping.

How does the 384 kHz / 24-bit DSD256 USB input limit what I can play?

The USB interface accepts PCM up to 384 kHz at 24-bit and DSD up to DSD256. Higher-rate files will be down-sampled by the source, and lower-rate files pass through unchanged or can be upsampled to 384 kHz in OS mode.

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