Windows 10: JBL Tune750BTNC Bluetooth Audio - Bad Quality

Discus and support JBL Tune750BTNC Bluetooth Audio - Bad Quality in Windows 10 Drivers and Hardware to solve the problem; Hi, My bluetooth headphone JBL Tune750BTNC does not work for calls gives bad distorted sound from my Windows 10 PC winver 1909 build 18363.1082. It... Discussion in 'Windows 10 Drivers and Hardware' started by Charles Youssef cyoussef, Sep 25, 2020.

  1. JBL Tune750BTNC Bluetooth Audio - Bad Quality


    My bluetooth headphone JBL Tune750BTNC does not work for calls gives bad distorted sound from my Windows 10 PC winver 1909 build 18363.1082.

    It works fine as a media output using the stereo bluetooth device output.But as a calling device which uses the "hands-free audio" bluetooth device, it gives bad distorted barely understandable output.

    The problem can be seen from the "test" option of the audio device in the sound control panel, giving very bad sound quality.

    Troubleshooting done:

    - Same headset works fine with android & mac, for both calling and media output
    - Upgraded all the drivers on my laptop to the latest: didn't help
    - Already went through all the steps here: didn't help
    - Tried disabling the stereo device keeping only the "hands-free audio" device active: didn't help

    - Tried disabling features services from the device under "devices and printers" services tab: didn't help

    - Windows update is up to date and system lenovo x1 is scanned and updated for all drivers: Issue still persist.

    Looking forward for your assistance in resolving this issue.


    Charles Youssef cyoussef, Sep 25, 2020

  2. HARMAN Announces the JBL Synchros S400 Bluetooth Headphones

    HARMAN International Industries, Incorporated, is proud to announce the JBL Synchros S400BT Bluetooth wireless on-ear stereo headphones, full of new features and innovations, bringing world-renowned JBL professional audio sound in a wireless configuration.

    The new JBL Synchros S400BT headphones deliver the superb sound-staging that the JBL Synchros line is known for. It combines intuitive touch-sensitive control with the on-the-go freedom and convenience of Bluetooth 3.0 wireless connectivity with advanced aptX audio encoding to bring you a unique combination of innovative user interface with JBL's balanced audio and PureBass performance.

    JBL Tune750BTNC Bluetooth Audio - Bad Quality HARMAN_JBL_Synchros_S400_01_thm.jpg

    "At HARMAN, we know that technology should serve to make our audio experiences better. That's why our engineers are constantly pushing the limits to offer consumers simpler ways of engaging with their music," said Michael Mauser, president, Lifestyle Division, HARMAN. "With these new Bluetooth headphones, we are giving consumers not only the convenience of a wireless audio connection, but an even simpler way of controlling the experience with our new touch sensor controls. Add in JBL Professional Audio sound with PureBass performance and our customers will be enveloped in a revolutionary experience of sound and simplicity."

    JBL Synchros S400BT headphones are both easy to use and powerful to experience; the intuitive touch-sensor interface on its left earcup lets you adjust music volume, switch tracks or receive calls with the simple swipe of a finger. No more fumbling for tiny buttons in hard-to-reach places: the whole surface of the earcup acts as a single touch-sensitive control system. The touch-sensitive surface of the cup tracks the movement of your fingers across the touch sensor with an LED trail, spotlighting your audio experience for all eyes to see. NFC technology enables easy pairing with other NFC devices with a simple tap. And the built-in batteries boast 15 hours of playback time via Bluetooth, with the ability to connect via cable for passive playback mode. 40 mm drivers deliver amazing JBL clarity and hard-hitting bass, while the echo-cancellation technology enables natural sounding phone calls. For comfort, ergonomics and portability, JBL Synchros S400BT headphones sport 3D-axis earcup rotation and plush leather cushions with an authentic steel headband. Viewed as a whole, the S400BT is a wireless headphone that's meant to celebrate - as much as to simplify - premium listening.

    Features and Specifications:
    • JBL professional audio sound with PureBass performance
    • Advanced aptX encoding for the best possible wireless audio experience
    • Bluetooth 3.0 technology for a wireless listening experience
    • Simple NFC pairing capability
    • Touch sensor controls intuitively manage music & calls
    • Smart LED light trail follows the swipe of your finger on the touch sensor earcup
    • USB rechargeable battery lasts up to 15 hours
    • Dual use: plug in the included cable to use even while the battery is charging
    • 40 mm driver delivers amazing clarity and hard-hitting bass
    • Echo-cancellation technology for more natural sounding phone calls
    • 3D-axis earcup rotation enhances ergonomic fit and portability
    • Plush leather cushions and authentic steel headband for functionality and comfort
    Pricing and Availability
    For additional information on the JBL Synchros S400BT Headphones (MSRP $299.95), or to purchase, visit
    Cristian_25H, Sep 25, 2020
  3. Headphones not showing up as separate playback device, bad quality audio

    Hi Anna,

    The bad quality audio that you are experiencing can occur due to several reasons, such as, an outdated audio driver, a missing audio driver, etc. To better assist you, kindly answer the following questions:

    • What is the make and model of your computer?
    • What are the exact troubleshooting steps that you've taken so far? This is for us to avoid providing the same steps.
    • Have you tried updating your audio driver? If not, kindly do so by following the steps in this article:

      Update drivers in Windows 10

    We look forward to your response.
    Joshua Her1, Sep 25, 2020
  4. JBL Tune750BTNC Bluetooth Audio - Bad Quality

    Poor audio quality from Bluetooth headphones

    Hello Caleb,

    Thank you for writing to Microsoft Community Forums.

    1. Since when are you facing this issue?
    2. Are you aware of any changes being made on the PC?
    3. What is the make and model of the PC?

    I suggest you to follow the steps mentioned below and check if that helps.

    Method 1:

    Run the troubleshooter for Bluetooth.

    1. Go to Settings > Updates & Security > Troubleshoot.
    2. Under Find and fix other problems click on
    3. Follow the instructions on the troubleshooter.

    Method 2:

    Try updating the Bluetooth drivers. Refer the article to

    update drivers in Windows 10

    Also, you can refer the article by Bose on
    poor sound quality from a Bluetooth device

    optimizing audio

    Hope it helps.

    Let us know if you got the help you needed by clicking ‘Yes’ or ‘No’.


    Prakhar Khare

    Microsoft Community – Moderator
    Prakhar_Khare, Sep 25, 2020

JBL Tune750BTNC Bluetooth Audio - Bad Quality

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