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Silver desktop DAC and headphone amplifier with front volume knob and rear ports

FiiO

FiiO K11 R2R DAC Headphone Amplifier Silver

SKU CH-XWW6-0PR9S

Entry-level desktop DAC and headphone amplifier with fully differential 24-bit R2R ladder architecture for cleaner, darker background sound

  • ColorSilver
  • Fully differential 24-bit R2R ladder with 192 ultra-thin film resistors
  • 1% resistor accuracy and low temperature drift across four channels
  • NOS and OS modes for versatile audio experiences
  • Clean, sharp output with a dark musical background
  • Desktop DAC and headphone amplifier for computers, phones, tablets and HiFi players

First R2R desktop DAC

FiiO K11 R2R is the brand's first entry-level desktop DAC and headphone amplifier with a full R2R architecture. It targets listeners who want the distinctive sound of resistor-ladder conversion without moving to higher-priced gear. The unit connects to computers, smartphones, tablets and portable players to upgrade their analogue output. It is not for buyers who need balanced XLR outputs or integrated streaming functions.

Fully differential 24-bit array

The K11 R2R uses a newly developed fully differential complementary 24-bit resistor array with four channels. Each channel contains 48 ultra-thin film resistors at 0.1% accuracy, totalling 192 resistors with low temperature drift between channels. This architecture delivers lower noise, fewer harmonic components in the FFT and a darker musical background. Both NOS and OS modes are available for different presentation styles.

Silver desktop chassis

The silver-finished chassis sits on a desk and provides single-ended headphone output plus line-level RCA connections. Front-panel controls select NOS or OS mode and adjust volume for headphones or powered speakers. No balanced headphone jack or XLR line output is included, so owners of balanced headphones or fully balanced speaker chains cannot use those connections directly.

Highlights

  • Fully differential 24-bit R2R ladder with 192 ultra-thin film resistors
  • 1% resistor accuracy and low temperature drift across four channels
  • NOS and OS modes for versatile audio experiences
  • Clean, sharp output with a dark musical background
  • Desktop DAC and headphone amplifier for computers, phones, tablets and HiFi players

Specifications

ColorSilver

Questions about this item

How do I connect the K11 R2R to my computer for the first time?

Use the supplied USB cable to link the unit to a free USB port on your PC; the device draws power and receives audio over that single connection.

What part of the R2R ladder may need attention after extended use?

The 192 ultra-thin film resistors are rated for long life, but dust on the circuit board can affect the 0.1% matching, so occasional compressed-air cleaning is advised.

At what point does the NOS mode stop accepting higher sample rates?

NOS mode keeps the original sampling rate without up-sampling, so any incoming stream above the DAC's native 24-bit limit will be truncated rather than over-sampled.

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