FiiO A3 - Portable Headphone Amplifier (Black)

FiiO A3 - Portable Headphone Amplifier (Black)

FiiO A3 - Portable Headphone Amplifier (Black)

B&H # FIA3B MFR # A3B
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Product Highlights

  • 450 mW at 16Ω Power Output
  • Fully Discrete Bass Boost Circuit
  • Approximately 16 Hour Run Time
  • 1400 mAh Rechargeable Battery
  • 20 to 20,000 Hz Frequency Response
  • All-Aluminum Alloy Body
  • Shields Against EM Interference
  • OPA1642 Voltage Pre-Amplifier
  • AD8397 Power Amplifier
  • Low - High Gain Toggle Switch
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FiiO A3 overview

  • 1Description

The black colored version of the Fiio A3 - Portable Headphone Amplifier is designed for mobile Hi-Fi listening applications and is compatible with a wide range of headphones, earphones, and other in-ear monitoring systems. The all-aluminum alloy body and chassis of the amplifier shields against electromagnetic interference and the built-in rechargeable 1400 mAh battery provides approximately 16 hours of operation on a four-hour charge via mini USB port. For I/O, it features an 1/8" stereo auxiliary input and an 1/8" stereo headphone output.

The device utilizes an OPA1642 as the voltage pre-amplifier and an AD8397 power amplifier to deliver a maximum power output of 450 mW at 16Ω (270 mW at 32 Ω) with a frequency response of 20 to 20,000 Hz, a signal-to-noise ratio of equal to or greater than 108 dB, and a T.H.D. of less than 0.004% into loads between 16 and 150Ω.

For controls, the amplifier includes a low-high gain toggle switch, a rotary volume control, and a fully discrete bass boost circuit that can be bypassed to decrease interference and lower the overall noise floor.

In the Box
FiiO A3 - Portable Headphone Amplifier (Black)
  • USB Charging Cable
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    FiiO A3 specs

    Input 1/8" (3.5 mm) stereo aux
    Gain GAIN=L: Sensitivity = 2.4 V
    GAIN=H: Sensitivity = 0.8 V
    Output 1/8" (3.5 mm) stereo headphone
    Volume Control ALPS potentiometer
    Frequency Response 20 to 20,000 Hz
    Crosstalk ≥ 72 dB (Gain=H)
    Signal to Noise Ratio > 108 dB
    THD 0.004% at 1,000 Hz
    Channel Imbalance <0.5 dB
    Balance Control GAIN=L: Balance = 0.3 dB
    GAIN=H: Balance = 0.2 dB
    Charging Time 4 hours
    Power Supply Mini USB Port
    Battery Capacity 1400 mAhH
    Operating Time Up to 16 hours
    Power Input 5 VDC at 500 mA
    Input Impedance 16 to 150 Ω
    Output Impedance <0.2 Ω
    Output Power 270 mW (32 Ω)
    450 mW (16 Ω)
    Output Current Limit 92.6 mA
    Output Voltage 8.67 Vp-p
    Dimensions 3.59 x 2.20 x 0.51" (91.2 x 56.0 x 13.0 mm)
    Weight 3.2 oz (92 g)
    Packaging Info
    Package Weight 0.5 lb
    Box Dimensions (LxWxH) 5.2 x 5.2 x 1.0"

    FiiO A3 reviews

    A3 - Portable Headphone Amplifier (Black) is rated 5.0 out of 5 by 4.
    Rated 5 out of 5 by from Great, robust and practical amplifier. This is a great starter amplifier. Out of the box it's build quality is solid. Interface is simple. It's shape and plug orientation could be improved. I do notice better quality in instrument separation when listening to various genres of music. Amplification is just adequate for my situation. I work in loud atmosphere. But at my home it's plenty.
    Date published: 2015-12-20
    Rated 5 out of 5 by from An excellent one-purpose device I use the Fiio A3 primarily with my Fostex T50RP-mk3s. Those headphones are fairly hard to drive (think HD600's), and the setting is always on High Gain and >6 on the dial, with source at 100. In comparison, with my Sony MDR-V6's, High Gain and 5 on the dial is the limit before the sound is unbearably loud. The Fiio A3 amplifies cleanly, and there do not appear to be frequencies that are significantly elevated or hidden compared to others. (I don't have any other amplifiers to compare to so I don't feel comfortable going into too much detail about the sound.) The bass boost feature is somewhat subtle - it won't make headphones boom, and it doesn't add sub-bass or rumble if there isn't any in the headphones already. Across the few headphones I tested, I would describe the bass as punchy. In turn, the bass boost leaves untouched most of the clarity in the mids and highs. There are no other features to this device. Physically the A3 has a smooth, polished aluminum surface (my unit was black). It is very solidly built, and I would feel comfortable dropping it from 6ft. The switches for bass boost and gain are very small but easily switchable. The only problem is that they feel identical and can't be used without looking at the labels. One thing I was surprised by despite looking at a lot of pics before buying was how small the A3 is, like the size of a well-used bar of soap. The A3 comes with a very short 3.5mm to 3.5mm cable, a microUSB cable, 2 flat silicone sheets, and 2 rubber bands. The last two were included for portable use, presumably to strap the A3 onto your music player. However, given that I use a touchscreen smartphone as my driver, I do not use these. I have not done this, but I would rather use 3M velco strips. My preferred setup is a long 3.5mm to 3.5mm cable from source audio to A3 and a cloth wrapped around the device with a rubber band holding it together.
    Date published: 2017-02-14
    Rated 5 out of 5 by from Simple, Clean Paired with the FiiO X3 primarily for the easy volume control. With X3's customizable EQ and A3's Bass boost, the combo provides a lush, rich sound. I use the X3/A3 for my .WAV backing traks that I play through a PA for live music. The output is clean, fat and happy.
    Date published: 2017-12-05
    Rated 5 out of 5 by from Audio Full Filled A day after purchase this little device is transforming so far my cell phone, macbook, and desktop all sound better going to try on 5.1 surround system next.
    Date published: 2017-10-19
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