FiiO K1


FiiO K1
Portable headphone amplifier and DAC



Product Highlights

  •  Supports Up to 24-Bit/96 kHz
  • Plug-and-Play: No Batteries needed
  • Drive Ability: 16 to 100 Ohms
  • Frequency Response: 20 Hz to 20 kHz
  • Savitech SA9023A USB Receiver
  • TI PCM5102 DAC Chip
  • TPA61332A Headphone Driver
  • Self-Muting Reduces On/Off Transients
  • Includes Micro-USB Cable



See Overview, Technical Data and Comparison below.


FiiO Q1
FiiO E17K
FiiO E18



  • The thumb-sized K1 from FiiO is a portable headphone amplifier and DAC with mastering quality sound that supports resolutions of up to 24-bit/ 96 kHz. The unit offers true plug-and-play operation with no batteries needed and no drivers necessary for operation. The K1's audio architecture utilizes Savitechs's SA9023A USB receiver to decode USB audio, while the high fidelity, low noise TI PCM5102 DAC chip outputs to the TPA 61332A headphone amplifier, which is capable of driving most headphones with a range of 16 to 100 ohms. The K1 also self-mutes when powering on or off, reducing harmful transients. The all-metal chassis is sandblasted for optimal sheen, texture, durability of appearance, and handgrip. The K1 ships with a removable clip and a micro-USB connection cable.

  • Weight: 11.3g
    Dimensions: 50 x 0.8 x 0.3 (mm)
    Battery Capacity: N/A
    Battery Life: N/A
    Charging Time: N/A
    Audio Input: Micro USB
    Volume Control: N/A
    Drive Ability: 16 to 100 ohms
    Output Amplitude: > 75 mW
    THD: <0.01
    Frequency Response: 20 Hz~20 kHz
    Input Sensitivity: >0 dB
    Crosstalk: > 70dB
    GAIN: 1.2dB
    MAX Output Voltage: 3.25 Vp-p
    Colour Available: Titanium
    Headphone Output: 3.5 mm stereo jack
    Sample Rate: Max 96kHz/24bit supported
    Power Input: USB 5V/500mA
    Output Impedance: < 1
    Signal to Noise Ratio: > 100 dB
    MAX input level: N/A
    Channel Imbalance: < 0.3dB
    MAX output current: 35.93mA
    Bass Boost Range: N/A

    Frequency Response diagram of curves


    Distortion Diagram of curves


  • Model NameQ1K1E10KALPEN 2-E17K
    General Specifications
    Color AvailableBlackTitaniumBlackBlack
    Dimensions97 x 56 x 13.1 (mm)50 x 0.8 x 0.3 (mm)49.1 mm×80 mm×21 mm104.1 x 62.2 x 12.8 (mm)
    Weight100 g11.3 g78 g110 g
    Analog Audio inputMicro USBMicro USBMicro USB3.5 mm stereo Jack
    Digital Audio inputN/AN/AN/AMicro USB/Coaxial/3.5 mm jack(COAXIAL adapter attached)
    Headphone output3.5 mm Stereo Jack3.5 mm Stereo Jack3.5 mm Stereo Jack3.5 mm Stereo Jack
    Line Output3.5 mm Stereo JackN/A3.5 mm Stereo JackDock(Micro USB)/3.5 mm Line Out port
    Headphone Impedance Range16~150 Ω16 to 100 Ω16~150 Ω16~150 Ω
    Volume ControlTOCOS Potentiometer N/AALPS Potentiometer Digital Volume Control (0-60)
    Bass Adjust0/5 dBN/AYESYES
    Treble AdjustN/AN/AN/AYES
    Balance AdjustN/AN/AN/A5 dB
    GAIN Control-7dB/4.5dB (AUX IN)
    -3.5dB/8dB (USB IN)
    Line Out BypassYESN/AN/AYES
    Audio Performance (DAC Section)
    USB Sample Rate Support32/44.1/48/96 kHz (16/24 bit) Max 96kHz/24bit supportedN/A32/44.1/48/96 kHz (16/32 bit)
    DSD 2.8 MHz Supported
    SPDIF Sample Rate SupportN/AN/AN/A32/44.1/48/96/192 kHz (16/24 bit)
    THD+N<0.0045% (10 kΩ/1 kHz) (LO) <0.01% (1 kHz)<0.006% (1 kHz)<0.003% (1 kHz)
    SNR≥107dB ≥100dB>105 dB >110 dB
    Dynamic Range>95 dB N/AN/A>102 dB
    Line Out Level>1.48 Vrms N/AN/A>1.5 Vrms
    Output Power1>190 mW (32 Ω/THD+N<1%) >75 mW(16Ω/THD+N<1%)200 mW (32 Ω/THD+N<1%)> 220 mW (32 Ω)
    Output Power2>75 mW (150 Ω/THD+N<1%) >35 mW(32Ω/THD+N<1%)N/A>290 mW (16 Ω)
    Frequency Response20 Hz~20 kHz20 Hz~20 kHz20 Hz~20 kHz20 Hz~20 kHz
    Output impedance<0.3 Ω ≤ 1 Ω<1.04 Ω <0.3 Ω
    Crosstalk≥75dB (1 kHz) ≥70 dB (1 kHz)≥70 dB (1 kHz)>75 dB (1 kHz)
    MAX GainN/A1.2 dB1.6 dB (GAIN=L)
    8.8 dB (GAIN=H)
    >12 dB
    Peak Output Voltage7.2 Vp-p3.25 Vp-p7.39 Vp-p>7.8 Vp-p
    MAX output Current>75 mA 35.93 mA81.6 mA>115 mA
    Input Overload4.3 Vrms N/AN/A4 Vrms
    Power and Battery
    Power/ChargerRecommend DC5V 1AUSB on PCrecommend DC5V 500mARecommended DC5V 1A
    Charging DisplayYESN/AN/AYES
    Battery Level displayN/AN/AN/AYES
    Capacity1400 mAhN/AN/A1500 mAh
    Charge Time>30 h N/AN/A>15 h
    Battery Life≤4 h N/AN/A≤ 220 min