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Sony NW-A45 Walkman®

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

Item # 158NWA45BK

Enjoy your high-res music files with the Sony NW-A45 Walkman. You can stream to wireless headphones via Bluetooth.

Enjoy your high-res music files with the Sony NW-A45 Walkman. You can stream to wireless headphones via Bluetooth.

Discontinued item
20 questions - 51 answers

Item # 158NWA45BK

About the Sony NW-A45 Walkman®

High-res audio entertainment

With the Sony NW-A45 Walkman you've got choices. Enjoy high-res music files, such as those you can download from sites like HDtracks. There's also a built-in FM radio, so you can listen to your favorite station or catch the big game. Use the ‘A45's built-in Bluetooth to stream to a set of wireless headphones. You can even use the ‘A45 as an external DAC (digital audio converter) for your computer to make its music sound even better.

High-res audio entertainment

With the Sony NW-A45 Walkman you've got choices. Enjoy high-res music files, such as those you can download from sites like HDtracks. There's also a built-in FM radio, so you can listen to your favorite station or catch the big game. Use the ‘A45's built-in Bluetooth to stream to a set of wireless headphones. You can even use the ‘A45 as an external DAC (digital audio converter) for your computer to make its music sound even better.

Sony NW-A45 Walkman

The NW-A45's compact size makes it easy to take anywhere (headphones not included).

Support for high-resolution audio files

The NW-A45 is compatible with high-res PCM-based files (up to 24-bit/192kHz), DSD (Direct Stream Digital) files, Apple Lossless, and other formats. For low-resolution files, such as MP3s, The player is also MQA-compatible.

Sony's Digital Sound Enhancement Engine can help them sound fuller. The built-in rechargeable battery can deliver up to 45 hours of operation, so you can enjoy music all day and then some.

High-res Bluetooth streaming

This player also has built-in Bluetooth for wireless music streaming. On top of that, it features Sony's LDAC technology, which 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. 

Storage for high-res files

The 'A45 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.


Product highlights:

  • plays MP3, FLAC, Apple Lossless, AAC, APE, WAV, and WMA audio files (up to 24-bit/192kHz)
  • 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, with up to 128GB additional storage (up to 144GB total memory)
  • 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
  • stereo minijack headphone output (3.5mm)
  • 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 3-3/4"H x 7/16"D
  • weight: 3.5 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # NWA45/B

What's in the box:

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

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Crutchfield response

<< >>

More details on the Sony NW-A45 Walkman®

Mark G.
The Sony NW-A45 Walkman® replaces these items:

Product Research


Overview: The Sony NW-A45 is a Hi-Res Walkman digital music player, capable of playing high-resolution audio files. Hi-Res audio (24-bit, 96kHz and up) transmits 3.2x more data than CD audio (16-bit, 44.1kHz), allowing you to hear more detail and nuances in your music. The NW-A45 also has Bluetooth Audio Streaming with NFC technology for easy connection and wireless listening. The unit features a 3.1" LCD screen, and an internal 16 GB flash memory. You can add even more memory by inserting a microSD card.

Supported Audio Formats: The NW-A45 Hi-Res Walkman can support multiple digital audio formats:

MP3 32-320 kbps (incl. VBR) at 32, 44.1, and 48 kHz
WMA 32-192 kbps (incl. VBR) at 44.1 kHz
FLAC 16, 24-bit at 8 and 192 kHz
WAV 16, 24, 32-bit at 8 and 192 kHz
AAC 6-320 kbps at 8 and 48 kHz
HE-AAC 32-144 kbps at 8 and 48 kHz
Apple Lossless 16, 24-bit at 8 and 192 kHz
AIFF 16, 24, 32-bit at 8 and 192 kHz
DSD 1 bit at 2.8224, 5.6448, and 11.2896 MHz
APE 8, 16, 24-bit at 8 and 192 kHz (Fast, Normal, High)
MQA Supported

Design: The NW-A45 features solid build quality with a 3.1" TFT WVGA color display (800 x 480 pixels) with white LED backlighting. It has a capacitive touch screen for on-screen control. The circuits and components are attached to the circuit board with a Sony-developed high-quality, lead-free solder for a purer signal path. The S-Master HX digital amplifier is optimized for high-resolution audio playback, delivering smooth, natural sound over a wide 20Hz-40kHz frequency range.

Music Transfer: The NW-A45 lets you transfer music from your PC or Mac to the internal memory or to an inserted MicroSD card. Using Windows Explorer or Music Center for PC, or Mac Finder or Content Transfer for Mac, you can rip music from CDs, or import content stored on your computer or an external media device, and load it onto the Walkman. You cannot connect the player to your phone or transfer music via Bluetooth for playback on the NW-A45.

DSEE HX: Sony has included their DSEE HX "up-scaling" technology in the NW-A45. 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.

Memory: The NW-A45 has a 16 GB internal memory, which has the capacity for the following number of recordable songs (approximately 4 minutes in length):

  • MP3 (128 kbps): 3,300 songs
  • AAC (256 kbps): 1,600 songs
  • FLAC:
    • 44.1 kHz/16-bit: 300 songs
    • 96 kHz/24-bit: 90 songs
    • 192 kHz/24-bit: 40 songs
  • DSD (2.8224 MHz/1-bit): 70 songs
Note: Actual user memory is approximately 12.26 GB, as a portion of the memory is used for data management. The unit's memory card slot will also accept microSD cards for even more memory capacity.

FM Tuner: The NW-A45 has a built-in FM tuner for listening to radio broadcasts. The frequency range of the FM tuner is 87.5 to 108.0 MHz. The FM tuner can be turned on when a pair of headphones are connected, as the headphone cable serves as an antenna. Up to 30 FM stations can be set as presets, manually or automatically.

Bluetooth/NFC: With built-in Bluetooth 4.2, you can stream your music files wirelessly from compatible devices up to 30 feet away. Devices that have the NFC (Near-Field Communication) function, can be automatically turned on, and paired with the Walkman, by simply touching the back of the Walkman to the device on the NFC logo. The NW-A45 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.

Sound Quality Settings: You can adjust the sound quality with the following selectable functions: 6-band Equalizer (with presets Rock, Pop, Jazz, Classical, EDM, R&B, HipHop, Relax, and Custom 1&2), DSEE HX, DC Phase Linearizer, VPT (Studio, Club, Concert Hall, Matrix), Dynamic Normalizer, ClearAudio+, and Clear Phase.

Special Modes with Sony Headphones: The NW-A45, when used with certain Sony headphones offer extra listening modes. These functions should be turned off if using incompatible headphones to save battery power:

  • Noise Canceling: Headphones with Noise Canceling include the IER-NW500N, IER-NW500NE, MDR-NW750N, and MDR-NW750NE. The Noise Canceling function reduces ambient noise, and allows you to listen to your music at a low volume.
  • Ambient Sound Mode: The IER-NW500N and IER-NW500NE also have an Ambient Sound Mode, that allows you to hear ambient sound, even while wearing headphones. It uses the built-in microphones to pick up and amplify ambient sounds to help you stay aware or your surroundings.

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

  Ambient Sound Mode Off / On Noise Cancel Off / On
MP3 128 kbps 45 hrs / 30 hrs 45 hrs / 37 hrs
AAC 256 kbps 39 hrs / 27 hrs 39 hrs / 33 hrs
FLAC 96kHz/24-bit 39 hrs / 27 hrs 39 hrs / 32 hrs
FLAC 192kHz/24-bit 30 hrs / 23 hrs 30 hrs / 27 hrs
DSD 2.8224 MHz/1-bit 25 hrs / 20 hrs 25 hrs / 22 hrs
Radio --- 32 hrs / 27 hrs
Direct REC 8 hours MP3 (128kbps)
Bluetooth MP3: 20 hours (SBC connection)
FLAC: 13 hours (LDAC, Auto)

Connections/System Requirements: On the bottom of the unit is a 3.5mm stereo headphone output, plus a 22-pin WM-PORT for connecting the unit to a computer using the supplied USB cable. The NW-A45 is compatible with computers with the following operating systems: Windows 7, Windows 8.1, Windows 10, and macOS v10.8-10.12. You can also use the WM-PORT to connect the unit to one of Sony's Headphone DAC/Amplifiers, such as the PHA-1A or PHA-3 (special cable supplied with the headphone amplifier).


  • Frequency Response: 20 Hz to 40 kHz
  • Audio Power Output: 35mW + 35mW max
  • Dimensions: Width 2.2", Height 3.839", Depth 0.432"
  • Weight: 3.5 ounces

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Customer Q&A

20 questions already asked

Can this record FM programming?
[ PETER  Mar 29, 2020 ]
4 answers
[ Bruce  Mar 29, 2020 ]
I have never tried it but I think it can.
[ Bruce  Mar 29, 2020 ]
Of course no, it's just HD audio player. Thanks
[ Van  Mar 29, 2020 ]
This unit has no recording capabilities.
[ Ron  Mar 29, 2020 ]
Wait a sec... so the EQ doesn't work if you're utilizing Bluetooth headphones? Does the music sound 'flat' when using Bluetooth then?
[ PSYS001  Dec 27, 2019 ]
2 answers
The music sounds fine to me while using Bluetooth speakers. I haven't used Bluetooth headphones. I am thoroughly happy with my NW-A45.
[ Stephen L.  Dec 28, 2019 ]
Sorry, I use the audio jack to connect to my Boom audio power speaker on my Harley. For Bluetooth audio, I have a Sony headset to match to it.
[ james  Dec 28, 2019 ]
does everyone has problem with volume? I have to crank up to 60 to hear sound level I wanted but my old Sony NWZ-S544 needs up to 15 I can hear sound loud enough. Does anyway to fix that?
[ Dennis  Dec 16, 2019 ]
1 answer
The only thing that works for me is Bluetooth Headphones or Bluetooth speakers with their own volume control. The player completely lacks the oomph to push a decent pair of cans.
[ alan  Dec 16, 2019 ]
is a walkman nw-a45 compatible with the mac operating system version 10.15.1?
[ M  Dec 07, 2019 ]
2 answers
I have no idea, I have windows 10.
[ SUSAN  Jan 06, 2020 ]
Hi - as of late December, it is not, in terms of downloading iTunes purchases to the Walkman. Hopefully, Sony will release a new download program that is not 32 bit, because that is the problem.
[ Harry  Jan 06, 2020 ]
Can this be powered through my Hyundai USB port? 19 Kona. And how would it play through my factory radio? USB or Headphone?
[ Chris  Sep 08, 2019 ]
3 answers
It should work fine to power it through the USB. It will connect to Bluetooth headphones. I'm not sure if it would connect to car's Bluetooth connection. It plays HD tracks beautifully so worth high quality headphones.
[ T Jeff  Sep 08, 2019 ]
I use at home and office only
[ Tai  Sep 08, 2019 ]
It plays best thru the bluetooth connection; to get the volume you will have to use an amp with the headphone jack. The "usb" only works to power the unit
[ alan  Sep 08, 2019 ]
I am looking at getting THE Sony NW-A45/B 16GB Bluetooth Walkman for my son but i want to ensure he can use it WITHOUT any of the bluetooth function on. (for health reasons). Do you know if this is possible? Thank you
[ Lulu  Aug 25, 2019 ]
6 answers
Yes. I currently use the player connected directly into an older amp (no bluetooth available) using the output jack with no issues.
[ Erik  Aug 27, 2019 ]
Yes. There is a 3.5 mm jack, and bluetooth can be disabled.
[ Scott  Aug 26, 2019 ]
You can turn the Bluetooth function off if you want. It doesn't affect the other functions of the device in any way.
[ Ron  Aug 26, 2019 ]
Yes you can turn off the bluetooth function and use the headphone cable
[ Rafael  Aug 26, 2019 ]
I just turned BT off and plugged in headphones. Worked fine.
[ Stanley  Aug 26, 2019 ]
You don't need to have Bluetooth enable to use device
[ Oliver  Aug 25, 2019 ]
Can I connect this to my avr via usb?
[ Steve  Mar 31, 2019 ]
3 answers
I am not sure. But Crutchfield's online chat helped me pick this device for what I needed. They were excellent answering my technical questions. I am sure they can answer this question
[ Steven  Apr 01, 2019 ]
The cord that is supplied has one side proprietary and the other side is usb.
[ Scott  Apr 01, 2019 ]
No, but you can use Bluetooth if your AVR has the capability.
[ Preston  Mar 31, 2019 ]
Is there any round-a-bout way to transfer over Master or Hi-Fi quality tracks from Tidal to the player?
[ K  Nov 08, 2018 ]
1 answer
Hi; I understand that Tidal sells a subscription for use of their music library. My experience with this service is excellent, but the only music you can actually transfer is the library you paid for.
[ Adalberto  Nov 08, 2018 ]
can I connect via bluetooth to the stereo system in my 2018 vw jetts?
[ Robert  Oct 31, 2018 ]
3 answers
Yes, I can connect to my 2018 Subaru's bluetooth! It sounds great!!!
[ KIMBERLY  Nov 01, 2018 ]
Yes, absolutely BLUETOOTH & NFC. with high end sound.
[ Van  Oct 31, 2018 ]
Yes it has bluetooth. I had no issues connecting it to my mega boom via bluetooth
[ Steven  Oct 31, 2018 ]
how much memory can be added ?
[ Lisa  Aug 12, 2018 ]
5 answers
You can add up to 128GB.
[ Paula  Aug 14, 2018 ]
128 gig
[ Daniel  Aug 14, 2018 ]
up to 128 GB
[ STUART  Aug 14, 2018 ]
Hi Lisa I bought a couple of SaDisk micro cards 64G on sale at COSTCO. Put one in and increased my storage capacity substantially. If I need more I'll probably buy a higher capacity card. I hope this helped. Good Luck Vince H
[ vince  Aug 14, 2018 ]
You can add a 128GB card as max. Some people are claiming you can use a 256GB card but I believe they are mistaken. Your best bet is to contact Sony directly. I am using a 128GB card and the unit reads it with no problem.
[ MONTE A  Aug 14, 2018 ]
I have a Sony NW-E394 that I use at the gym. The FM reception is very poor. Headphone cord serves as antenna. Would this model be any better or is this a weakness common to all of these little portable players?
[ Karl  Jul 25, 2018 ]
1 answer
I'm afraid we don't have enough information on the Sony NW-E394 model to compare the tuner quality to the NW-A45 model. However, the NW-A45 has a built-in FM tuner with a frequency range of 87.5 to 108.0 MHz. And similar to what you described, the FM tuner can be turned on when a pair of headphones are connected, as the headphone cable serves as an antenna. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Thanks!
[ Larry  Jul 31, 2018 ]  Staff
Does this Sony player handle podcasts?
[ Craig  May 22, 2018 ]
1 answer
If you load them onto the memory in a compatible file format, absolutely.
[ Ryan  Jun 02, 2018 ]  Staff
Can I download my I tunes library onto the NW-A45 ?
[ Jimmy G  May 19, 2018 ]
1 answer
Yes. You have to transfer it through Sony's software, but yes. I have not however tried, older, protected files. I've only used ALAC files, as I don't want the lower quality files in the device.
[ Omar  May 20, 2018 ]
I am assuming you can plug it in via usb to a headunit in my vehicle?
[ LED ZEPP  May 19, 2018 ]
1 answer
Sorry, no. USB is a digital connection so, you wouldn't want to connect the player this way as it would bypass the Sony's high quality digital to analog converter. If you want to connect the Sony to a car stereo, the better option would be to use the analog headphone output connected to an auxiliary audio input on the stereo. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service:
[ Ryan  May 31, 2018 ]  Staff
Can you upload music and album artwork like I do now on my I pod from I tunes?
[ LED ZEPP  May 19, 2018 ]
1 answer
You can upload both. Just not exactly the same way. Not all artwork seems to be compatible. I had to update some artwork in iTunes for it to be compatible with the Walkman. You will use Sony's software to transfer data from iTunes to Walkman (drag n drop). Easy, but tedious.
[ Omar  May 20, 2018 ]
[ FERNAND  Dec 19, 2019 ]
1 answer
The Walkman comes with USB transfer that I use without software to transfer music files from my PC. I use Overdrive for access to library books and audio books, but not for music transfer. The player connects to USB port and will allow file transfer directly from hard drive. I hope this helps.
[ Dana  Dec 19, 2019 ]
can this be connected to stereo reciever?
[ greyve  Aug 20, 2019 ]
9 answers
I connect mine with the aux jack to Pioneer network receiver and it plays great.
[ Dana  Sep 21, 2019 ]
Yes it can with either Bluetooth or a wired connection 3.5 mm to rca or just 3.5 to 3.5 cable depends on the input of said receiver. I hook mine up with a 3.5 to rca.
[ Luke  Aug 20, 2019 ]
Yes, if your stereo receiver has blue tooth.
[ Joan  Aug 20, 2019 ]
Yes, but in my experience, like any MP3 or digital music player, you will need to turn both the player and the receiver or car radio up to a high volume level in order to hear music at a normal sound level. Music players do not have amplifiers.
[ MICHAEL G.  Aug 20, 2019 ]
Yes, I've done so for years. Simply plug the units output into a unused input into the receiver. 1/8" mini-pin to two RCA jack cables are commercially available. Volume on the MP3 player may need to be turned up.
[ Dennis  Aug 20, 2019 ]
I've never used it in that manner
[ Kevin  Aug 20, 2019 ]
Yes it can! This mp3 player is the BEST!!
[ MELBA K  Aug 20, 2019 ]
as long as it has a stereo input or blutooth.
[ William  Aug 20, 2019 ]
Yes it can. I have A Marantz Receiver. Works well.
[ Ralph  Aug 20, 2019 ]
Does the amp have enough power to drive high-impedance headphones like the Sennheiser HD650?
[ Aaron  Oct 31, 2018 ]
4 answers
Hi Aaron I am sorry but I only have basic headphones. Good Luck Vince
[ vince  Nov 05, 2018 ]
Yes, it has plenty of volume levels to work fine with whatever headphones you use.
[ William  Nov 05, 2018 ]
I don't know the answer. I've used several Bose wireless and wired headphones and it works very well with those.
[ Stanley  Nov 05, 2018 ]
I haven't used it on headphones yet , I've only listen to my small JBL speaker,,, sorry can't help you
[ Alfredo  Nov 05, 2018 ]

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