FiiO A3



FiiO A3
Headphone Amplifier


Product Highlights

  • Compact and Lightweight
  • Standard 3.5mm I/O
  • Multiple Gain and Bass Options
  • 1400 mAH Lithium Ion Battery
  • Brushed Aluminum Body
  • Built-in Power Converter Module
  • LED Power Indicator Light & Gain Switch


See Overview, Technical Data and Comparison below.


  • The FiiO A3 Headphone Amplifier is a compact and lightweight headphone amplifier that offers high-quality audio, ideal for portable music devices. The amplifier has standard 3.5mm input and output connectors for compatibility with a variety of MP3 players, CD players, computers, earbuds, headphones, and other devices. It has a heavy-current 3-channel amplified circuit that lowers output impedance. It also provides high efficiency and a low-noise power boost. It provides precise and even sound pressure levels and a wide dynamic range.

    The convenient volume control uses a closed APLS potentiometer to ensure low noise and excellent channel balance. The amplifier offers 3 levels of bass boost and 2 levels of gain to meet your personal preferences and adapt to different sound sources. There are also high and low voltage options to meet different needs. An auto-lock protective circuit will turn the amplifier off automatically in the event of abnormal activity in order to protect your headphones and minimize the risk of hearing damage.

    The amplifier operates on a high-performance BL-5B Lithium battery that is easily replaceable. The battery provides approximately 10 hours of operation per charge, allowing you to listen all day. The amplifier has charging and power indicator LEDs to give you a visual cue of operation status. A charge priority function will cease operation while the amplifier is charging. Once the battery has been charged and the amplifier is unplugged, operation resumes.

    All-new appearance

    Aluminum-alloy body and chassis to provide shielding from interference and a beautiful design.

    Visual experience

    The new A3 is equipped with switches and knobs that are easy to read and operate.

    Improved sound performance

    The OPA1642 pre-amplifier serves as the voltage amp while the AD8397 power amp serves as the current amplifier for an elegant balance across all levels.

    Reinforced battery capacity

    With a bigger battery, the A3 will ensure for playback for at least 16 hours.


  • Model/Number: A3
    Weight: 92g
    Dimensions: 91.2 x 56 x 13 (mm)
    Battery Capacity: 1400 mAh
    Battery Life: >16 hours
    Charging Time:  <240 minutes
    Colour Available: Black
    Audio Input: 3.5 mm stereo jack
    Volume Control: ALPS Potentiometer
    Drive Ability: 16~150Ω (recommend)
    Output Power: 270 mW (32 Ω); 450 mW (16 Ω)
    THD: 0.004%@1KHz
    Frequency response: 20Hz~20KHz
    Input Sensitivity: GAIN=L : Sensitivity =2.4V ; GAIN = H: Sensitivity = 0.8 V
    Crosstalk: ≥72dB (Gain = H)
    Gain: GAIN = L: GAIN = -3.8dB; GAIN = H: GAIN = 11.7 dB
    MAX output voltage: 8.67 Vp-p
    Headphone Output: 3.5mm stereo jack
    Bass Boost:
    Power Input: DC 5V/500mA
    Output Impedance  <0.2 Ω
    Signal to Noise Ratio: >108dB
    MAX input Level: 92.6 mA
    Channel Imbalance: < 0.5 dB
    Balance: GAIN = L : Balance=0.3dB; GAIN = H: Balance =0.2dB
    MAX Output Current: Vmax>8V

    Frequency Response diagram of curves


    Distortion diagram of curves (GAIN=H)


    Distortion diagram of curves(GAIN=L).


  • Model/NumberA5A3A1
    General Specifications
    Color AvailableTitaniumBlack, TitaniumTitanium
    Dimensions124 mm×65.5 mm×14.5 mm91.2 x 56 x 13 (mm)42 x 40.7 x 9.4 (mm)
    Weight168 g92 g20g
    Power Indicator YesYesYes
    Audio input3.5mm stereo jack3.5mm stereo jack3.5mm stereo jack
    Headphone output3.5mm stereo jack3.5mm stereo jack3.5mm stereo jack
    Headphone Impedance Range16~300Ω(recommend)16~150Ω(recommend)16~150Ω(recommend)
    Volume ControlALPS PotentiometerALPS PotentiometerDigital volume control
    Line Control for deviceNONONO
    BASS Boost1 Level1 Level2 Level
    GAIN Control2 Level2 LevelNO
    Cross feedNONONO
    Supply Voltage AdjustableNONONO
    Audio Performance
    Output Power>800 mW(32Ω/THD<1%)
    >450 mW (16 Ω/THD+N<1%)>100 mW (16 Ω/THD+N<1%)
    Frequency Response10 Hz~90 kHz10 Hz~90 kHz20 Hz~20 kHz
    Output impedance<0.3Ω<0.2Ω<0.2Ω
    Crosstalk>75dB@ 1KHz>72dB@ GAIN=H≥65dB@ 1KHz
    THD+N<0.002% (1 kHz)<0.004% (1 kHz)<0.05% (1 kHz
    MAX BASS Boost>5dB@ BASS = ON>5 dB (BASS ONBass1: 2.7dB bass boost
    Bass2: 5.2dB bass boost
    Bass3: 5.2dB bass reduction
    MAX Gain≥13 dB>11 dB3.65 dB
    Peak Output Voltage14.96 Vp-p> 8.67VP-P4.52 Vp-p
    MAX output Current250 mA> 92.6mA50 mA
    Input Overload250 mA/1.35Vrms
    Power and Battery
    Power/Chargerrecommend DC5V 2A< recommend DC5V 1A
    recommend DC5V 0.8~1A
    Charging IndicatorYesYesYes
    Low battery AlarmYesYesNO
    Smart ChargeYesYesNO
    Replaceable BatteryNONONO
    Battery Life> 13H> 16H> 13H
    Charge Time<3 h<4 h≤90 mins