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    Updating the OontZ Angle 3XL to version 3.1

    OontZ Angle 3XL ULTRA update to Version 3.1 firmware is of benefit for the following:

    • When you are using an Apple Bluetooth source: iPhone; iPad; MacBook Pro, MacBook Air, iMac systems. The firmware version 3.1 enables the OontZ Angle 3XL to playback audio from Apple Source devices with more control over the volume levels offering a lower minimum volume and more volume level options up to maximum volume. 
    • When you are using Samsung and Android smartphones this firmware update fixes issues with dropped Bluetooth connections
    • Improves performance and reliability of OontZ Wireless Dual Pairing when playing audio from two OontZ Angle 3XL speakers paired together

    Please have the following items ready:


    OontZ Angle 3XL speaker(s) with power turned OFF and all cables unplugged

    Please note: If you have a pair of OontZ Angle 3XL speakers please be sure to update both speakers.  

    3.5mm Audio Cable
    that came with the speaker
    USB Thumb Drive with 16Gb or smaller capacity (not included with speaker)

    Step 1 : Download the firmware ZIP file named '' to your hard drive using the following link (Right-click and select "Save Link As..." to save ):

    Step 2 : The file '' must be unzipped before copying the contents to the USB Thumb Drive.  To unzip the file on a Mac, double-click it. To open the file on a PC, drag it to the desktop. Once the file is on the desktop, you can double-click to open the zipped file to see its contents.   It contains a folder named 'system' within it which you will copy to your USB Thumb drive.   Do not copy '' to the drive.

    Step 3: Drag and drop the folder 'system' to your USB Thumb drive.  The 'system' folder contains 2 files named "upgrade_XL.bin" and "upgrade.txt".

    If you experience any issue downloading the firmware files, please contact our support team by clicking here

    Step 4 :
     Power on the OontZ Angle 3XL by pressing and releasing the On/Off Button

    Step 5 : Open the Connector Flap on the rear of your OontZ Angle 3XL

    Step 6 : With your AUX IN 3.5mm audio cable not connected to any other device, insert one end into the AUX IN Jack (figure 6-a), the Bluetooth Indicator Light will turn green (figure 6-b) and you will hear the voice prompt: “AUX IN Source”. 

     figure 6-a figure 6-b

    Step 7 : Insert the USB drive into the USB Power Bank connector.  The USB drive should remain inserted until the firmware update process is complete.

    Step 8 : Press and Hold the Next Track button for 5 seconds (figure 8-a).
    The Red, Blue, and White lights will light up solid and remain on for about 30 seconds (figure 8-b)
    Important: Please watch the three lights as the 30 second time approaches to confirm the following sequence (see animation in Figure 8-c below):
    All three lights will flash together 7 times, then only the Red light will flash once, then the Green light turns on and remains solid as you hear the voice prompt: “AUX IN Source”. If the lights don't match this sequence then the firmware did not update successfully and you will have to repeat the update process

    figure 8-a figure 8-b figure 8-c

    After upgrading the firmware on the OontZ Angle 3XL be sure to re-pair your source device to the speaker.   You will need to "Forget this device" from your source device , then re-pair the OontZ Angle 3XL.   Click here for pairing instructions.