FiiO K11 R2R – Desktop R2R DAC & Headphone Amplifier with 1300 mW Output

FiiO K11 R2R – Desktop R2R DAC & Headphone Amplifier with 1300 mW Output

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K11 R2RDesktop DAc and Headphone AmplifierFully differential true 24Bit R2R DAC Resistor Arrays | NOS/OS dual modesHigh quality electronic volume... Read more

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    Description

    K11 R2R
    Desktop DAc and Headphone Amplifier
    Fully differential true 24Bit R2R DAC Resistor Arrays | NOS/OS dual modesHigh quality electronic volume control NJW1195A 1300mW+1300mW highoutput power | 3 gain levels, 3 volume curves Specially-designed audiocircuit | Specially-designed power supply High-quality Beryl solidcapacitors | Custom LCD screen | RGB logo lighting.

    The Fii0 K11 R2R is an affordable andcompact desktop DAC(Digital-to-AnalogConverter)and headphone amplifier thatbrings the coveted sound of R-2R(Resistor Ladder)technology to a proadeaudience.lt's designed for enthusiasts who want to experience the smooth natural, and musically engaging characte of R2R DACs without a high-end price tag making it a perfect entry point into the world of high-fidelity audio.
    Key Features & Description
    1. Authentic R-2R Resistor Ladder DAC
    The core of the K11 R2R is a discrete R-2R resistor network. Unlike common Delta-Sigma DAC chips, this method uses precision-matched resistors to convert digital signals to analog, a process often praised for its more natural and "analog-like" tonality.

    Specifications

    • Weight: 200gr
    • Usage: Indoor & outdoor

    Pros and cons

    • Sustainably produced
    • Ideal for everyday use
    • May discolor in direct sunlight
    • Banner image for: <h1>K11 R2R<br/>Desktop DAc </h1><h1>and Headphone Amplifier</h1>

      K11 R2R
      Desktop DAc

      and Headphone Amplifier

      fully differential true 24Bit R2R DAC Resistor Arrays | NOS/oS dual modes

      High quality electronic volume control NJW1195A 1300mW+1300mW high

      output power | 3 gain levels, 3 volume curves Specially-designed audio

      circuit | $pecially-designed power supply High-quality Beryl solid

      capacitors |Custom LCD screen | RGB logo lighting

    • Banner image for: <h1>Fully differential True 24bit</h1><h1>R2R DAC Resistor Arrays</h1>

      Fully differential True 24bit

      R2R DAC Resistor Arrays

      FllO' s newly self-developed four-channel fully differential 24bit
      R2R DAC consists of 2x 48 precision thin-film resistor arrays
      per channel, totaling 192 resistors with 0.1% tolerance and low

      temperature drift (30ppm). This configuration delivers a unique

      and charming sound.

    Comparison between fully differential and typical architectures

    The K11 R2R employs a fully diferential architecture, resulting in lower noise, withless FFT harmonics and a darker music background compared to typical ones

    • Banner image for: <h2>Double the fun Dual NoS/os modes</h2>

      Double the fun Dual NoS/os modes

      Maintains the original

      sampling rate for decoding, preserving authentic

      sound and allowing you to enjoy an organic and

      captivating musical experience.0S (Oversampling)

      Mode. Upsamples globally to a high sampling rate of

      384kHz, for superior audio performance and even

      more refined, clear sound.

    • Banner image for: <h2>True ·24bit decoding</h2><h2>Excellent capabilities,<br/>outstanding sound quality</h2>

      True ·24bit decoding

      Excellent capabilities,
      outstanding sound quality

      Support for PCM 384kHz/24bit and DSD256

      decoding, means the K11 R2R can easily handle

      high-precision audio signals and fully exhibit the

      details within, providing you with an excellent

      audio experience.*DSD256 requires setting the

      DSD output mode to Native on the source

      device, internally converting to PCM before

      being decoded by the R2R resistor arrays.

    • Banner image for: <h2>NJW1195A High quality</h2><h2>electronic volume control</h2>

      NJW1195A High quality

      electronic volume control

      The NJW1195A is a 4-channel electronic volume

      controller. This resistor ladder electronic

      potentiometer is low distortion and low noise.

      allowing precise volume adjustment.

      • Banner image for: <h2>3 gain levels+ 3</h2><h2>independent volume curves</h2>

        3 gain levels+ 3

        independent volume curves

        The 3 independent gain levels and volume curves allow

        the K11 R2R to give you a better listening experience

        with various types of headphones, whether you are

        using sensitive earphones or harder to drive over-ear

        headphones.

      Specially-designed audio circuit

      The audio signal is transmitted via a USB interface processor to a digital audio bridge. After being processed by an FPGA, it issent to the R2R DAC for 4-channel output after decoding. Then, it passes through two Ti OPA1642 op-amps for low-passfiltening and single-ended analog signal converting, and transmits to the Nyw1195A electronic volume control chip for precisevolume adjustment. The output stage uses two SGM8262 op-amps for 4 way phase inversion and amplificaion, resulting inoutputs of singed-ended and balanced analog sianals.
      The audio circuit features galin controls. it is complemented by a specially-designed headphone protection circut and a popnoise elimination system, ensuring the audio circuit is both high quality in sound produced and reliable.

      <h2>Specially-designed audio circuit</h2>

      Specially-designed power supply

      channel specialized power supply of - 9V, 8V, +7.5V, +6V, 5.4V, 3.3V, 1.8V,and 1 .2V. These are combined with an extemal custom 12V switching power supply to ensurethe purity of the power supplied and provide a solid foundation for stronger power output

      <h2>Specially-designed power supply</h2>
      • Banner image for: <h2>Image banner</h2>

        Image banner

        Under a 320 load, the K11 R2R is capable of pushing

        1300mW+1300mW under balanced modes. This

        allows it to easily drive many HiFi earphones and

        headphones to fully unlock their potential.

      • Banner image for: <h2>Adjustable RcB logo lighting</h2>

        Adjustable RcB logo lighting

        The FllO 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 carefully placed

        reflective film and parts of the body designed to reflect light to make

        the light show uniform and elegant.
        * Brightness, color, and light patterns all adjustable using the knob

      Safe and reliable Comprehensive safety systems

      RCA metal pressing
      Enhanced stability, reliable connection, and durability

      <h2></h2><h2></h2><h2>Safe and reliable Comprehensive safety systems</h2>

      Headphone amplifier heat dissipation upgrade

      silicone gel and aluminum alloy ensures fast heat dissipation

      <h2></h2><h2></h2><h2><strong>Headphone amplifier heat dissipation upgrade</strong></h2>

      Exclusive phosphor copper metal shielding

      The shielding cover undergoes a passivation process, providing corrosion resistance andanti-oxidation capabilities. lt effectively resists external interference, ensuring signals
      processed are accurate.

      <h2></h2><h2></h2><h2>Exclusive phosphor copper metal shielding</h2>
      <h2><strong>Dc protection</strong><br/></h2>

        Dc protection

        Prevents headphone damage from abnormal direct current output, providing peace of mind

        <h2>Smart power saving</h2>

          Smart power saving

          prevents the machine from overheating. Whenthe audio sianal resumes, the svstem will automatically return to its normal working state

          • Banner image for: <h2>Parts list</h2>

            Parts list

            ① K11 R2R*1
            ② Power adapter*1

            ③ Power cable*1

            ④ USB data cable*1

            ⑤ Headphone adapter*1

            ⑥ Quick start guide*1

            ⑦ Warranty card*1

          General Specifications

          Name/Model
          K11 R2R
          Color
          Black/Silver/Red/Titanium
          Weight
          About 420g
          Gain
          L/M/H
          Driver-free mode (switch mode)
          Supported
          Oversampling setting
          OS/NOS
          Max supported sampling rate
          384kHz-32bit/DSD256 (USB DAC) ；192kHz-24bit (Coaxial) ；96kHz-24bit (Optical)
          Hardware solution
          SoC: GD32F303RE, DAC: FIIO-developed R2R DAC, USB decoding: SA9312L, AMP: SGM8262-2*2
          Volume control
          Volume knob
          Dimensions
          147x133x32.3mm (including feet)
          Adaptive impedance
          PO: 8~150Ω / BAL: 8~350Ω
          FIIO Control
          N/A
          Sampling rate indication
           LOGO indicator light shows as default: Cyan: 48KHz and below/Yellow: above 48kHz/Green: DSD / Show on display screen 
          Firmware upgrade
          Supports upgrade through USB
          Buttons and Ports ：
          Knob
          Encoder knob (including volume adjusting and menu confirming)
          Single-ended line-out
          RCA port
          Digital coaxial in
          RCA port
          Balanced out
          Standard 4.4mm port
          USB
          Type-C (data transmission)
          Digital optical in
          Optical port
          Digital coaxial out
          RCA port (only works in USB mode)
          Headphone out
          Standard 6.35mm port
          Power Supply Parameters ：
          Power supply
          DC 12V/2A
          Battery capacity
          No battery
          Audio Parameters:
          Parts of performance and parameters of Line-out output (RCA, OS mode) :
          THD+N & Noise
          About 0.025% (1kHz/0dB@10KΩ)
          Crosstalk
          ≥111dB
          Frequency response
          20Hz~50kHz: damping＜1.2dB ； 20Hz~20KHz: damping＜0.2dB
          SNR
          ≥115dB (A-weighted)
          Noise floor
          ＜5.1uV (A-weighted)
          Dynamic range
          ≥107dB
          Line output level
          2.7Vrms
          Parts of performance and parameters of headphone output (6.35mm, OS mode) ：
          Output power
          L+R≥660mW +660mW(16Ω，THD+N＜1%) ；L+R≥460mW +460mW(32Ω，THD+N＜1%) ；L+R≥50mW+50mW (300Ω，THD+N＜1%）
          Channel crosstalk
          ≥72dB
          Frequency response
          20Hz~50kHz: damping＜1.3dB ；20Hz~20KHz: damping＜0.2dB
          SNR
          ≥115dB (A-weighted)
          Noise floor
          ＜7.2uV (A-weighted)
          Dynamic range
          ≥107dB
          Output impedance
          ＜1Ω
          Peak output voltage
          11Vp-p
          Parts of performance and parameters of headphone output (4.4mm, OS mode) ：
          Output power
          L+R≥520mW+520mW (16Ω, THD+N＜1%) ； L+R≥1300mW+1300mW (32Ω, THD+N＜1%) ；L+R≥220mW+220mW (300Ω, THD+N＜1%）
          Parts of perform
          ≥107dB
          Frequency response
          20Hz~50kHz: damping＜1.3dB ；20Hz~20KHz: damping＜0.2dB
          THD+N
          About 0.025% (1kHz/-11.6dB@32Ω)
          SNR
          ≥115dB (A-weighted)

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