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Sony NW-A55 Walkman®

High-resolution portable digital music player with Bluetooth® and FM tuner (Black

Item # 158NWA55B

The NW-A55 Walkman delivers great sound with your high-res audio tracks, and comes with some cool extras.

The NW-A55 Walkman delivers great sound with your high-res audio tracks, and comes with some cool extras.

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Item # 158NWA55B

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About the Sony NW-A55 Walkman®

High-res audio entertainment

The Sony NW-A55 Walkman lets you enjoy high-res music files, such as downloads from sites like HDtracks. And it lets you listen to your favorite radio station or catch the big game through its built-in FM tuner.
Sony NW-A55 Walkman

High-res audio entertainment

The Sony NW-A55 Walkman lets you enjoy high-res music files, such as downloads from sites like HDtracks. And it lets you listen to your favorite radio station or catch the big game through its built-in FM tuner.

Use Bluetooth to stream your music to a set of wireless headphones. The player's built-in rechargeable battery can deliver up to 45 hours of operation, so you can listen all day and then some.

Support for high-resolution audio files

The NW-A55 is compatible with high-res PCM-based files (up to 32-bit/384kHz), DSD (Direct Stream Digital) files, Apple Lossless, and other formats. And it delivers great sound from your MP3s. The player is also MQA-compatible.

High-fidelty Bluetooth streaming

The player's Bluetooth is enhanced by Sony's LDAC technology. This allows the wireless signal to retain more musical detail with compatible Sony speakers and headphones. We recommend pairing this player with Sony's best Bluetooth headphones — the WH-1000XM3 wireless noise-cancelers — for a super-sounding portable listening rig.

Selectable sound enhancements

How do you like your music? The 'A55 has a 6-band equalizer, so you can fine tune the sound of your music. For low-resolution files, such as MP3s, the player has ClearAudio+. This feature enhances the sound of compressed audio. The VPT (Surround) setting gives you a much wider stereo soundfield.

And if you're both new and old school, select the Vinyl Processor. It gives your music the warm, rich sound of an analog LP. it even has a hint of surface noise as well.

Storage for high-res files

The 'A55 features 16GB of built-in storage. If you need more memory, the player's microSD card slot can accommodate up to a 128GB card. That gives you up to 144GB of storage, plenty for high-resolution files as well as CD-quality audio files. And of course, you can carry extra cards with you for an even bigger music library.

READ LESS

Product highlights:

  • plays MP3, FLAC, Apple Lossless, AAC, APE, WAV, and WMA audio files (up to 32-bit/384kHz)
  • Direct Stream Digital (DSD) files (.dff and .dsf formats up to 11.2MHz resolution)
    • DSD files are converted to PCM for playback
  • rendering for MQA (Master Quality Authenticated) audio files
  • microSD card slot accepts microSD, microSDHC, or microSDXC cards (available separately)
  • 16GB internal flash memory
    • accepts cards up to 128GB (up to 144GB total storage)
  • 3-1/16" color touchscreen display (800 x 480 pixels)
  • built-in FM tuner
  • Bluetooth-compatible with LDAC Hi-Fidelity wireless music streaming
  • NFC touch pairing with compatible devices
  • DSEE HX™ and ClearAudio+ sound modes for restoring compressed music
  • S-Master HX amplification offers accurate, detailed playback of high-resolution music files
  • selectable audio effects, including6-band equalizer, Vinyl Processor, and VPT Surround
  • 3.5mm stereo minijack headphone output
  • high-speed USB 2.0 port
  • rechargeable battery provides up to 45 hours of playback
  • USB 2.0-compliant cable included for file transfer and battery charging
  • 2-1/4"W x 3-7/8"H x 7/16"D
  • weight: 3.5 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 13864833

What's in the box:

  • Portable digital audio player (grayish black)
  • 42" USB cable (Type A USB on one end and WM-PORT plug on other end)
  • Instruction Manual
  • Startup Guide
  • Limited Warranty (US & Canada)
  • CEA Listen for a Lifetime

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More details on the Sony NW-A55 Walkman®

Mark G.

Product Research

Features

Overview: The Sony NW-A55 is a Walkman A-series digital music player, capable of playing high-resolution audio files up to 32-bit / 384kHz. The NW-A55 has Bluetooth Audio Streaming for wirelessly listening to your favorite music, either transmitted from the player to your Bluetooth headphones or speakers, or transmitted from your smartphone or tablet to the player. You can also use the unit as a USB-DAC to stream music from your computer and bypassing the computer's digital-to-analog converter. The device is equipped with a 3.5mm mini jack output for headphones. The unit features a 3.1" LCD screen, and an internal 16 GB flash memory. You can add even more memory by inserting an optional microSD card.

Supported Audio Formats: The NW-A55 Hi-Res Walkman can support multiple digital audio formats:

MP3 (.mp3) 32-320 kbps (incl. VBR) at 32, 44.1, and 48 kHz
WMA (.wma) 32-192 kbps (incl. VBR) at 44.1 kHz
FLAC (.flac) 16-bit, 24-bit at 8 kHz - 384 kHz
WAV (.wav) 16-bit, 24-bit, 32-bit at 8 kHz - 384 kHz
AAC (.mp4, .m4a, .3gp) 16-320 kbps at 8 kHz - 48 kHz
HE-AAC (.mp4, .m4a, .3gp)
32-144 kbps at 8 kHz - 48 kHz
Apple Lossless (.mp4, .m4a) 16-bit, 24-bit at 8 kHz - 384 kHz
AIFF (.aif, .aiff, .afc, .aifc) 16-bit, 24-bit, 32-bit at 8 kHz - 384 kHz
DSD (.dsf, .dff) 1 bit at 2.8224, 5.6448, and 11.2896 MHz
APE (.ape) 8-bit, 16-bit, 24-bit at 8 kHz - 192 kHz (Fast, Normal, High)
MQA (.mqa.flac) Supported

Construction: The NW-A55 is precision-engineered and constructed with high-quality materials and components for superior sound quality. It has a rigid aluminum milled frame which shields the internal circuitry from electrical noise. Internally, the NW-A55 uses a gold-plated circuit board and contact springs for low impedance, which leads to better bass and clear midrange response. To minimize signal loss, the circuit board uses audio-grade, lead-free solder with a small amount of gold for optimal signal transfer.

Side-mounted Controls: The unit has a row of physical controls along the right edge of the player. Buttons include music playback controls (play/pause, skip forward (hold down for fast forward), skip backward (hold down for fast rewind), Volume up, Volume down, and Power. A sliding Hold switch locks the playback operating buttons and volume controls to avoid accidental commands.

Memory: The NW-A55 has a 16 GB built-in internal memory for storing your high-resolution music files. If more storage is needed, there is a slot for an optional microSD memory card. Based on an average of 4 minutes per song, the built-in memory can hold the following number of songs:

  NW-A55 (16 GB)

MP3 (128 kbps)

3,300 songs
AAC (256 kbps)

1600 songs

FLAC (44.1 kHz/16-bit)

300 songs

FLAC (96 kHz/24-bit)

90 songs

FLAC (192kHz/24-bit)

40 songs

DSD (2.8224 MHz/1-bit) 70 songs
Note: The actual usable memory is approximately 12.26 GB. A portion of the memory is used for data management functions.

Bluetooth/NFC: With built-in Bluetooth 4.2, you can stream your music files wirelessly from compatible devices to the player, or stream music to your Bluetooth headphones or speakers, up to 30 feet away. Devices, such as a smartphone or Bluetooth headphones, that have the NFC (Near-Field Communication) function, can be automatically turned on, and paired with the player, by simply touching the device to the N-mark on the back of the player. The NW-A55 is equipped with LDAC, which uses the conventional Bluetooth connection, but transfers data at up to 999 kbps. That's three times the transfer rate of other audio profiles, which results in higher fidelity. In addition, the unit supports aptX and aptX HD.

USB-DAC Function: The NW-A55 lets you enhance the sound of the music stored on your computer without transferring it to the player. The USB-DAC function bypasses the usually inferior Digital-to-Analog Converter (DAC) of your computer, using the higher quality DAC in the NW-A55. You'll need to install a USB-DAC compatible application to your computer, such as Music Center for PC, or Hi-Res Audio Player for Mac. When the USB-DAC function is active, you cannot listen to music via Bluetooth, or turn on the Ambient Sound Mode or Noise Canceling function.

FM Radio Tuner: The NW-A55 has a built-in FM radio tuner that allows you to listen to FM broadcasts through your headphones. You can preset up to 30 radio stations, either manually or automatically. Receivable stations can be scanned by pressing the < or > buttons. Scan sensitivity can be changed, if needed, plus you can switch from stereo to mono output. The player uses the cord of connected headphones as an antenna. Sound quality settings do not apply to FM radio.

Ambient Sound / Noise Canceling: The Ambient Sound Mode and Noise Canceling functions are found on select models of Sony headphones. Ambient Sound Mode lets you hear ambient sound while you wear headphones, so you can safely pay attention to your surroundings. The Noise Canceling function reduces ambient noise, allowing you to hear your music more clearly without distraction. The NW-A55 works with the compatible headphones to activate the Ambient Sound Mode and Noise Canceling functions. Compatible headphones include: IER-NW500N/NE and MDR-NW750N/NE.

Sound Quality Settings: You can adjust the sound quality with the following Sound Quality Settings:

  • 6-band Equalizer/EQ Presets: You can adjust the sound at 6 individual EQ bands at 60Hz, 400Hz, 1kHz, 2.5kHz, 6.3kHz, and 16kHz. The adjustment can be made from -10 to +10dB, and saved as Custom 1 or Custom 2 presets. Other available presets include Bright, Excited, Mellow, Relaxed, or Vocal.
  • DSEE HX: DSEE HX uses an algorithm to analyze the music, and automatically replace the "lost" information. DSEE HX (Digital Sound Enhancement Engine) gives your highly-compressed music files new life so they sound almost as good as true Hi-Res Audio quality. DSEE HX can be turned on or off, as desired.
  • DC Phase Linearizer: This function makes low frequency phase characteristics more similar to a traditional analog amplifier. It can be turned on/off, as desired.
  • VPT (Surround): The VPT (Virtualphones Technology) function is a proprietary sound processing technology from Sony, and applies a surround effect and enriches the sound quality of the audio playback.
  • Vinyl Processor: The Vinyl Processor can add the character of vinyl recordings to your digital recordings with subtle reproduction of the low-frequency resonance, tone-arm resonance, and surface noise.
  • Dynamic Normalizer: The Dynamic Normalizer moderates the change in volume between tracks to minimize differences in volume level.

Rechargeable Battery: The NW-A55 has a built-in Lithium-Ion rechargeable battery for exceptional stamina. After a 4-hour full recharging time (via USB power), the unit's estimated battery life is as follows:

Music Format Approximate Battery Life
Ambient Sound Noise Canceling
MP3 128 kbps 30 hrs ON, 45 hrs OFF 37 hrs ON, 45 hrs OFF
AAC 256 kbps 27 hrs ON, 39 hrs OFF 33 hrs ON, 39 hrs OFF
FLAC 96kHz/24-bit 27 hrs ON, 39 hrs OFF 32 hrs ON, 39 hrs OFF
FLAC 192kHz/24-bit 23 hrs ON, 30 hrs OFF 27 hrs ON, 30 hrs OFF
DSD 2.8224 MHz/1-bit 20 hrs ON, 25 hrs OFF 22 hrs ON, 25 hrs OFF
FM Radio N/A 27 hrs ON, 32 hrs OFF
Bluetooth MP3 128 kbps 20 hrs Transmitter / 15 hrs Receiver mode
Bluetooth FLAC 96kHz/24-bit 13 hrs Transmitter / 12 hrs Receiver mode

WM-PORT / System Requirements: The unit has a bottom-mounted, 22-pin WM-PORT interface between the device and your computer. With the included 42" WM-PORT-to-USB cable, you can charge the battery and transfer music content. Downloadable software is available for use with the NW-A55: Music Center for PC (Windows 7, 8.1, 10) or Content Transfer for Mac (macOS 10.10 - 10.13). You can also transfer content directly by dragging and dropping music files from Windows Explorer (Windows) or Mac Finder (Mac).

Specifications:

  • Frequency Response: 20 Hz to 40 kHz
  • Dimensions: Width 2.17", Height 3.836", Depth 0.427"
  • Weight: 3.5 ounces

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