Sony NW-A55 Digital Audio Player 16GB Black

The NW-A55 Walkman is the latest iteration in Sony’s popular A series compact high resolution digital audio players.

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The NW-A55 Walkman is the latest iteration in Sony’s popular small form factor A series high resolution digital audio players. Compared to the A45, the A55 now sports a smooth aluminum finish with curvier edges that make it easier to hold. Changes under the hood include a higher contrast display with noticeably faster UI performance, which makes Sony’s class-leading user interface even easier to use. The A55 also features some new sound enhancements including upgraded high res upsampling with DSEE HX and a interesting new Vinyl Processing mode, which aims to reproduce the analogue wamrth of vinyl recordings. Also inherited from higher end Walkmans like the NW-ZX300 is the new Bluetooth Receiver function, which allows you to beam music from your phone or computer to the A55 via Bluetooth, with support for advanced codecs LDAC and AAC. This is useful if you want to listen to streaming apps such as Spotify or Podcasts but prefer the output of your Walkman. The Sony NW-A55 features fantastic battery life, with up to 45 hours of listening time (128k MP3).

In terms of output, the Sony retains the typical clean and punchy output of the A series Walkmans. Just like previous generations the A55 has lower than average power output (35mW @ 16ohms), which means that we recommend it pairing with dynamic driver and hybrid earphones, and easy to drive headphones. With those the A55 produces great output with a useable 120 steps of digital volume control. The A55 still has a significant degree of background noise, so we can’t recommend it with sensitive multi-balanced armature IEMs like the Campfire Andromeda.

The NW-A55 offers class leading battery life and UI design. If you want a compact player with stronger output specifications, try the Fiio M7. Or if you would prefer to stick with Sony, the ZX300 is the next step up, offering a lower noise floor and a 4.4mm balanced output that is up to 6 times more powerful than the A55's stereo jack.

  • High-Resolution Audio compatible
  • BLUETOOTH Receiver function
  • Digital Noise Cancelling and ambient sound mode
  • Available with 16GB, 64GB, 16GB with headphone, 32GB with headphone on-board storage
  • NWA55B 16GB Player
  • USB Data/Charging cable
  • Documentation

Size & Weight

  • DIMENSIONS (W X H X D): Approx. 55.7mm x 97.3mm x 10.8mm 2.20 inches x 3.84 inches x 0.43 inches
  • WEIGHT: Approx. 99 g 3.50 Oz


  • Size/Resolution: 3.1-inch (7.8 cm), WVGA (800 × 480 Pixels)
  • Panel type: TFT touch display with white LED-backlight


  • USB Hi-Speed USB (USB 2.0 compliant)
  • Headphone Stereo Mini-jack
  • WM-PORT WM-PORT (multiple connecting terminal): 22 pins
  • External memory microSD, microSDHC, microSDXC

FM radio

  • FM Frequency range 87.5 MHz to 108.0 MHz
  • Antenna Headphone cord antenna


  • Version Communication system: Bluetooth Specification Version 4.2
  • Supported Bluetooth profiles:A2DP, AVRCP
  • Supported Codecs (Transmission): SBC, LDAC, aptX, aptX HD
  • Supported Codecs (Reception): SBC, LDAC, AAC


  • NFC: Active type (for reader and writer),Tag Type

Battery Life

  • MP3 (128 kbps): Approx. 45 hours
  • FLAC (192 kHz/24 bit): Approx 30 hours

Supported Formats

  • MP3 ( .mp3) 32 kbps - 320 kbps (Supports variable bit rate (VBR)) / 32 kHz, 44.1 kHz, 48 kHz
  • WMA ( .wma) 32 kbps - 192 kbps (Supports variable bit rate (VBR)) / 44.1 kHz
  • FLAC ( .flac) 16 bit, 24 bit / 8 kHz - 384 kHz
  • WAV ( .wav) 16 bit, 24 bit, 32 bit (Float/Integer) / 8 kHz - 384 kHz
  • AAC ( .mp4, .m4a, .3gp) 16 kbps - 320 kbps / 8 kHz - 48 kHz
  • HE-AAC ( .mp4, .m4a, .3gp) 32 kbps - 144 kbps / 8 kHz - 48 kHz
  • Apple Lossless ( .mp4, .m4a) 16 bit, 24 bit / 8 kHz - 384 kHz
  • AIFF ( .aif, .aiff, .afc, .aifc) 16 bit, 24 bit, 32 bit / 8 kHz - 384 kHz
  • DSD ( .dsf, .dff) 1 bit / 2.8224 MHz, 5.6448 MHz, 11.2896 MHz
  • *Audio that is converted to Linear PCM is output.
  • APE ( .ape): 8 bit , 16 bit , 24 bit / 8 kHz - 192 kHz (Fast, Normal, High)
  • MQA ( .mqa.flac): Supported
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