FiiO K11 DAC & Headphone Amplifier

Large Range of Inputs and Outputs Equipped with optical and coaxial digital inputs, a USB-C port, RCA analog line outputs, and two headphone jacks (1/4″ unbalanced and 4.4mm balanced), the K11 acts as a bridge between your computer, phone, speakers, and headphones, allowing them to work together seamlessly.

1400mW Output Power Under a 32-ohm load, the K11 is capable of pushing 1400mW under balanced modes. This allows it to easily drive many hi-fi earphones and headphones to fully unlock their potential.

Gain Levels and Volume Curves The K11 has three separate gain levels, each with its own volume curve. This provides a better listening experience with various types of headphones, whether you are using sensitive earphones or hard-to-drive over-ear headphones.

Specially Designed Audio Circuit and Power Supply Within the K11’s slim build lies a special audio circuit designed for great sound quality. This is backed by more than 16 low-noise LDOs for precise voltage stabilization and powered by an external 12V switching power supply. All of this leads to a purer and more robust supply of power, leading to stable high-quality audio and truly enjoyable music, all of the time.

Slim and Stable Enclosure The slim aluminum alloy body allows you to easily place the K11 anywhere, making it easier to complement the rest of your desk. Thanks to the silicone antislip pad, the K11 rests stably and firmly on your table.

High-Contrast Display A custom, high-contrast display and durable VA display allows you to easily see the sampling rate, volume, gain, or output mode with just a glance.

Adjustable RGB Logo Lighting FiiO logo is illuminated with RGB lighting, giving you a quick way to identify the sampling rate of the current audio being played back. Six LED strips work in conjunction with a carefully placed reflective film and parts of the body designed to reflect light to make the light show uniform and elegant.

Single Knob Interface In the K11’s minimalist design, the volume knob acts as a crucial source of total control. The K11’s multifunction volume knob is used to power the device on and off, accessing menu operations, making volume adjustment, and other functions. The knob is designed so that you can quickly execute various complex actions by simply pressing and turning the knob. You can also quickly switch between LO/PO modes by double-pressing the knob, making it easier for you to appropriately connect to different headphones or audio setups.

Driver-Free Mode The K11 used in USB DAC mode does not require a driver on Windows 10 and above and can also be used with video game consoles such as PS5 and the Switch. Simply plug and play for worry-free usage, whether you are enjoying music or being immersed in games.

Number of Headphone Channels

• • Single Channel
• Recommended Headphone Impedance
  • Not Specified by Manufacturer
• Headphone Output Power
  • 1/4″ Unbalanced:
    • ≥ 520 mW per Side into 32 Ohms (1% THD)
    • ≥ 60 mW per Side into 300 Ohms (1% THD)
  • 4.4 mm Balanced:
    • ≥ 1400 mW per Side into 32 Ohms (1% THD)
    • ≥ 250 mW per Side into 300 Ohms
• Analog Audio I/O
  • 1x Stereo RCA TS Unbalanced Stereo Line Output (1 Stereo Pair)
• Digital Audio I/O
  • 1x TOSLINK Optical S/PDIF Input
  • 1x RCA Coaxial S/PDIF In/Out
• USB I/O
  • 1x USB-C
• Wireless
  • No
• Frequency Response
  • Line, Headphone, Balanced Headphone Outputs:
    • 20 Hz to 50 kHz
  • 20 Hz to 20 kHz
• Power Requirements
  • AC/DC Power Adapter (Included)
• Digital Chipset
  • DAC: 1 x Cirrus Logic CS43198
• Analog Circuitry
  • Power Amplifier Op-Amp: 2x SGM8262-2
• EQ
  • No
• Display
  • No
• Connectivity
  • Analog Audio I/O:
    • 1x Stereo RCA TS Unbalanced Stereo Line Output (1 Stereo Pair)
  • Digital Audio I/O:
    • 1x TOSLINK Optical S/PDIF Input
    • 1x RCA Coaxial S/PDIF In/Out
  • USB I/O:
    • 1x USB-C
  • Wireless:
    • No
• Performance
  • Frequency Response:
    • Line, Headphone, Balanced Headphone Outputs:
      • 20 Hz to 50 kHz
    • 20 Hz to 20 kHz
  • Maximum Output Level:
    • RCA Line Outputs: 1.95 Vrms
    • 1/4″ Headphone Outputs: 12 V p-p
    • 4.4 mm Balanced Headphone Outputs: 24.5 V p-p
  • Impedance:
    • 1/4″ Headphone Outputs: 8 to 150 Ohm (Unbalanced)
    • 4.4 mm Headphone Outputs: 8 to 350 Ohm
  • THD+N:
    • RCA Line Outputs: 0.00035%
    • 1/4″ Headphone Outputs: 0.00059%
    • 1/8″ / 3.5 mm Balanced Headphone Outputs: 0.001%
  • SNR:
    • RCA Line Outputs: ≥ 120 dB
    • 1/4″ Headphone Outputs: ≥ 123 dB
    • 4.4 mm Balanced Headphone Outputs: ≥ 123 dB
  • Noise:
    • RCA Line Outputs: < 0.9 µV (A-Weighted)
    • 1/4″ Headphone Outputs: < 2.8 µV (A-Weighted)
    • 4.4 mm Balanced Headphone Outputs: < 4.9 µV (A-Weighted)
  • Crosstalk:
    • RCA Analog/Line Outputs: ≥ 120 dB
    • 1/4″ Headphone Outputs: ≥ 71 dB
    • 4.4 mm Balanced Headphone Outputs: ≥ 106 dB
• Digital Audio
  • Sample Rates: 384 kHz (PCM)
  • Bit Depths: 32-Bit (DSD), Up to 32-Bit (PCM)
• Compatibility
  • OS Compatibility: Windows, macOS
  • Mobile App Compatible: No
  • Mobile Device Compatibility: No
• Power
  • Power Requirements: AC/DC Power Adapter (Included)
  • AC/DC Power Adapter: 15 VDC at 2 A (Included)
• Physical
  • Dimensions: 5.8 x 5.2 x 1.27″ / 14.7 x 13.3 x 3.23 cm
  • Weight: 0.9 lb / 407.0 g