About This Download

Benefits and Improvements

• Improves secure communication

Previous Benefits and Improvements

System Requirements

• An Android device (Ver. 9.0 or later) or an iPhone/iPad/iPod touch (iOS Ver. 15.0 or later)
• An active Internet connection
• The latest version of the Sony | Music Center application must be installed
• The speakers must be connected to your Android or iPhone/iPad/iPod touch

File Info

• Name: Firmware update 3700 for LSPX-S3
• Version: 3700
• Size: 1.56 MB (1 644 832 bytes)
• Release Date: 01-08-2026

Preparation

Check the Firmware Version

If the version is displayed as lower than 3700, we strongly recommend updating the firmware. If you're not sure, it's easy to check which version of the firmware you currently have:

1. Turn on the speaker.
2. Launch the Sony | Music Center app.
3. Connect your speaker to the Sony | Music Center app.
4. Select Settings.
5. Select System.
6. Confirm the firmware version (numbers in red box).
   

Important Notice

• DO NOT perform the update in a location where the Wi-Fi signal is inconsistent, such as:
  • on a train or in a place where Wi-Fi signals become congested
  • near a microwave, cordless phone, or any other devices that use the 2.4 GHz band frequency radio waves
• Make sure both devices (Android or iPhone/iPad/iPod touch and speakers) are fully charged.
• Make sure the speaker is connected to a power outlet via the AC adapter before starting the update.
• Disconnect all other Bluetooth devices such as wearable devices or smart watches from your Android or iPhone/iPad/iPod touch before starting the update.

Before You Upgrade

• Once updated, the firmware cannot be reverted to an earlier version.
• For Android devices, the update process will take approximately 5 minutes to complete.
  The file size is about 1.56 MB.
• For iPhone/iPad/iPod touch, the update process will take approximately 6 minutes to complete.
  The file size is about 1.56 MB.
• Depending on the wireless environment and your Android or iPhone/iPad/iPod touch, it may take longer to complete the update.
• To update these speakers, follow this procedure:
  • Download data from the server to iPhone/iPad/iPod touch or the Android device.
  • Transfer data from the iPhone/iPad/iPod touch or the Android device to the speakers.
  • Execute the update with the speakers.

Download & Install

To Update These Speakers, Follow the Procedure Below:

1. Download data from the server to the iPhone/iPad/iPod touch or the Android device.
2. Transfer data from the iPhone/iPad/iPod touch or the Android device to the speakers.
3. Execute the update with the speakers.

Step 1: Install the Update

1. Connect to a power supply outlet.
   Use the USB AC adapter and supplied USB Type-C® cable to connect the unit's DC IN 5 V port to a power outlet.
   Note: The software update cannot be performed when using battery power only.
2. Turn on the speaker.
3. Launch the Sony | Music Center app.
4. Connect your speaker to the Sony | Music Center app.
5. The following screen will be shown when the connection has been established.
   
6. If an update is applicable, Update the software of the speaker. will be displayed and you can press More Info.
   
7. Press OK to start the update.
8. Once the download starts, it will automatically move to the next screen after the download is completed.
9. Once the transfer starts, it will automatically move to the next screen after the transfer has been completed.
   Note: Do not turn off your speakers while downloading updates, transferring data, or updating, otherwise, the speakers may become unusable. When the software update is completed, press OK.
10. If the screen is not displayed, check whether the version has been upgraded in the following step.
11. The speaker automatically turns off when the software update ends.

Step 2: Check That the Update Was Successful

After the update, confirm that the new version has been installed successfully by following the Check the Firmware Version section steps.
Note: If the firmware version shown is 3700, the upgrade was successful.

Questions & Answers

An Update Error Message Appears

1. Press OK.
2. Restart (turn the power off then on) the speaker.
3. After that, restart Sony | Music Center and update again.

Even though the update failed during the process, check the firmware version. If the Version is shown as 3700, the firmware update was successful. If not, try the firmware update again. You can check the version from the setting in the Sony | Music Center application. To find out how to check the version, go to the Check the firmware version on this page.