FiiO K11 R2R Desktop DAC and Headphone Amplifier
FiiO K11 R2R Desktop DAC and Headphone Amplifier

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Fiio K11 R2R Desktop DAC and Headphone Amplifier

$229.99

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    Categories: , , , , SKU: N/A

    FiiO Presents The All-New And Upgraded 24Bit R2R DAC & Amp – The K11 R2R

    FiiO introduces an all-new R2R variant of its acclaimed K11 desktop DAC&Amp. Featuring a self-developed 24-bit R2R Resistor Array, the K11 R2R delivers smooth and rich sound. It offers NOS and OS dual operating modes, dual headphone outputs (6.35mm single-ended and 4.4mm balanced), and a powerful 1300mW per channel output with three-level adjustable gain. Experience rich, smooth, organic sound with the FiiO K11 R2R.

    Fully-Differential 24-Bit R2R DAC Architecture For Clean Sound

    FiiO’s K11 R2R features a newly developed four-channel, fully differential 24-bit R2R resistor array. Each channel has 48 resistors, totalling 192 high-precision ultra-thin film resistors with 0.1% accuracy and low-temperature drift. This advanced audio circuit architecture ensures clean, crisp output with a dark background.

    True Hi-Res Audio Signal Decoding And Dual Operating Mode

    The FiiO K11 R2R supports high-resolution audio decoding, handling up to 32-bit/384kHz PCM and DSD256 signals. It features switchable NOS (Non-Oversampling) and OS (Oversampling) modes, offering two distinct sound profiles. NOS maintains the original sampling rate for a more musical presentation, while OS upsamples to 384kHz for enhanced detail and clarity.

    Powerful Amplification Stage And Precise Volume Adjustment

    The FiiO K11 R2R boasts professionally designed amp circuitry with Ti OPA1642 low-pass filters and dual SGM8262 operational amplifiers. It delivers up to 1300mW per channel, easily driving demanding headphones. The device features three-level gain modes and three independent volume curves for compatibility with both sensitive and high-power gear and uses the NJW1195A digital volume chipset for precise, low-distortion volume adjustment.

    Seamless Connectivity With A Variety Inputs And Outputs

    The FiiO K11 R2R offers versatile input and output options for diverse audio setups. It features coaxial, optical, and USB digital inputs, along with 4.4mm balanced, 6.35mm single-ended headphone output, and RCA analog line-out connections. Designed to fit various audio needs without straining your budget, the K11 R2R pairs virtually with any device. Pair it with IEMs and headphones to enjoy high-resolution music in all its glory.

    Expertly Engineered Audio Circuit For Reliable Audio Transmission

    The FiiO K11 R2R transmits the audio signal via a USB processor to a digital audio bridge. After FPGA processing, it goes to the R2R DAC for 4-channel output, then through Ti OPA1642 op-amps for filtering and conversion to single-ended signals. The NJW1195A chip ensures precise volume adjustment. The output stage uses SGM8262 op-amps for 4-way phase inversion and amplification, resulting in single-ended and balanced outputs. The audio circuit includes gain controls, a headphone protection circuit, and a pop noise elimination system for high-quality, reliable sound.

    Embedding High-Quality Components For Unmatched Performance

    The FiiO K11 R2R is expertly engineered with high-quality internals for an exceptional music listening experience. It features Beryl solid capacitors for a stable, clean power supply, and enhanced heat dissipation with thermal silicone gel and aluminium alloy. An exclusive phosphor copper metal shielding provides corrosion resistance and anti-oxidation, ensuring accurate signal processing. The K11 R2R includes DC protection to prevent headphone damage, a smart power-saving mode, and durable metal-pressed RCA connectors for stability and longevity.

    Low-Noise Power Supply Design For Distortion-Free Sound

    The FiiO K11 R2R features a professionally designed low-noise power supply with 17 low-noise LDO precision voltage regulator ICs and 2 DC-DC converters, providing a multi-channel power supply of －9V, 8V, ±7.5V, ±6V, 5.4V, 3.3V, 1.8V, and 1.2V. Combined with an external custom 12V switching power supply, it ensures power purity and a solid foundation for powerful output, delivering a high-quality music listening experience.

    Designed With A Screen, RGB Logo And Multifunction Knob

    The FiiO K11 R2R features a robust, high-definition LCD screen that offers clear visuals and durability. It efficiently displays device status like sampling rates, volume, gain, and output mode. The illuminated RGB FiiO logo changes colours based on the active file’s bitrate, and its brightness, colour, and patterns are customisable via the multi-function knob. This knob also handles power, volume, and menu navigation, with a double press to switch between Line-out, Pre-out, and Phone-out modes. The slim aluminium body and silicone anti-slip pad ensure stable and flexible placement.

    Features & Specifications

    Headphone Output
    Standard 6.35mm port
    Standard 4.4mm port
    Buttons And Ports
    Knob : Encoder knob (including volume adjusting and menu confirming)
    Single-ended line-out : RCA port
    Digital coaxial in : RCA port
    USB : Type-C (data transmission)
    Digital optical in : Optical port
    Digital coaxial out : RCA port (only works in USB mode)
    Hardware Solution
    SoC: GD32F303RE,
    DAC: FIIO-developed R2R DAC,
    USB decoding: SA9312L,
    AMP: SGM8262-2*2
    Adaptive Impedance
    PO: 8~150Ω
    BAL: 8~350Ω
    Max Supported Sampling Rate
    384kHz-32bit/DSD256 (USB DAC)
    192kHz-24bit (Coaxial)
    96kHz-24bit (Optical)
    Sampling Rate Indication
    LOGO indicator light shows as default: Cyan: 48KHz and below/Yellow: above 48kHz/Green: DSD
    Show on display screen
    Oversampling setting
    OS/NOS
    Driver-free mode (switch mode)
    Supported
    Gain
    L/M/H
    Firmware upgrade
    Supports upgrade through USB
    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 : Line output level
    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
    THD+N : About 0.025% (1kHz/0dB@32Ω)
    SNR : ≥115dB (A-weighted)
    Noise floor : ＜7.2uV (A-weighted)
    Dynamic range : ≥107dB
    Output impedance : ＜1Ω
    Peak output voltage : 11Vp-p
    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%）
    Channel crosstalk : ≥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)
    Noise floor : ＜14.1uV (A-weighted)
    Dynamic range : ≥107dB
    Output impedance : ＜1.5Ω
    Peak output voltage : 23Vp-p
    Power Supply
    DC 12V/2A
    Battery capacity
    No battery
    Weight
    About 420g
    Color
    Black / Silver
    FIIO Control
    N/A
    Box Contents
    1. FiiO K11 R2R
    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

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