1. Introduction
Thank you for choosing the Motorola Sonic Sub 240 Portable Bluetooth Speaker. This compact yet powerful speaker delivers 7W of audio output with enhanced bass, offering an immersive listening experience. It features True Wireless Link (TWS) for stereo pairing, smart voice assistant compatibility (Siri, Alexa, Google Assistant), and a built-in microphone for hands-free calls. Its water-resistant design and long battery life make it ideal for various environments.
1.1 Package Contents
- Motorola Sonic Sub 240 Speaker
- USB Charging Cable
- User Manual

Figure 1: Front view of the Motorola Sonic Sub 240 speaker.
2. Setup
2.1 Charging the Speaker
- Locate the charging port on the speaker.
- Connect the provided USB charging cable to the speaker and a compatible USB power source (e.g., wall adapter, computer USB port).
- The LED indicator will illuminate to show charging status. It will turn off or change color when fully charged.
2.2 Powering On/Off
- To power on: Press and hold the Power button (⏻) for approximately 3 seconds until you hear an audible prompt and the LED indicator lights up.
- To power off: Press and hold the Power button (⏻) for approximately 3 seconds until you hear an audible prompt and the LED indicator turns off.
2.3 Bluetooth Pairing
- Ensure the speaker is powered on and in pairing mode (the LED indicator will flash rapidly).
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "Motorola Sonic Sub 240" from the list of devices.
- Once paired, you will hear a confirmation sound, and the LED indicator will stop flashing and remain solid.

Figure 2: Side view illustrating the control panel.
3. Operating Your Speaker
3.1 Basic Controls
- Play/Pause: Press the Play/Pause button (▶‖) once to play or pause audio.
- Volume Up: Press the Volume Up button (+) to increase volume.
- Volume Down: Press the Volume Down button (-) to decrease volume.
- Next Track: Press and hold the Volume Up button (+) for 2 seconds.
- Previous Track: Press and hold the Volume Down button (-) for 2 seconds.
3.2 True Wireless Link (TWS) Pairing
The True Wireless Link feature allows you to connect two Motorola Sonic Sub 240 speakers for a stereo sound experience.
- Ensure both speakers are powered on and not connected to any Bluetooth device.
- On one speaker, press and hold the TWS button (often indicated by a chain link icon) for 3 seconds. The speaker will enter TWS pairing mode.
- Repeat the previous step on the second speaker.
- The speakers will automatically connect to each other. Once connected, one speaker will act as the master (left channel) and the other as the slave (right channel).
- Now, connect your device to the master speaker via Bluetooth as described in section 2.3.
3.3 Voice Assistant Activation
The speaker supports smart voice assistants such as Siri, Alexa, and Google Assistant.
- To activate your device's voice assistant, press the Voice Assistant button (often indicated by a microphone icon) once.
- Speak your command after the prompt.
3.4 Making Calls
With the built-in microphone, you can make and receive calls through your speaker when connected to a smartphone.
- Answer Call: Press the Play/Pause button (▶‖) once.
- End Call: Press the Play/Pause button (▶‖) once during a call.
- Reject Call: Press and hold the Play/Pause button (▶‖) for 2 seconds.
4. Maintenance
4.1 Water Resistance
The Motorola Sonic Sub 240 is water-resistant and splash-proof. This means it can withstand splashes of water, but it is not designed to be submerged in water. Ensure all port covers are securely closed before exposure to moisture.
4.2 Cleaning
- Wipe the speaker with a soft, damp cloth.
- Do not use abrasive cleaners, alcohol, or chemical solvents, as these may damage the surface.
- Ensure the speaker is completely dry before charging or using it again after cleaning.
4.3 Storage
When not in use for extended periods, store the speaker in a cool, dry place away from direct sunlight and extreme temperatures. It is recommended to fully charge the battery before storing and to recharge it every few months to maintain battery health.
5. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Speaker won't turn on. | Ensure the battery is charged. Connect the speaker to a power source using the USB cable. |
| Cannot pair via Bluetooth. | Make sure the speaker is in pairing mode (flashing LED). Disable and re-enable Bluetooth on your device. Ensure the speaker is within the 10-meter range. Forget previous pairings on your device and try again. |
| No sound or low volume. | Check the volume levels on both the speaker and your connected device. Ensure the speaker is properly paired. |
| True Wireless Link (TWS) not connecting. | Ensure both speakers are not connected to any other Bluetooth device. Follow the TWS pairing steps carefully (Section 3.2). |
| Voice assistant not responding. | Ensure your device's voice assistant is enabled and the speaker is properly connected. Speak clearly and close to the speaker. |
6. Specifications
- Model Name: SP015BK
- Item Model Number: MT-SP015BK
- Speaker Type: Subwoofer
- Speaker Maximum Output Power: 7 Watts
- Connectivity Technology: Bluetooth 5.0
- Wireless Communication Technology: Bluetooth
- Bluetooth Range: 10 Meters (33 feet)
- Power Source: Battery Powered
- Playtime: Up to 11 Hours
- Special Features: Sound Amplification, Travel, Wireless, Smart Voice Assistant, True Wireless Link
- Control Method: Voice
- Compatible Devices: Laptop, Smartphone, Tablet
- Is Waterproof: TRUE (Splash-proof)
- Color: Black
- Product Dimensions: 2.95 x 2.95 x 3.86 inches
- Item Weight: 12.3 ounces
- UPC: 816479017902

Figure 3: Rear view of the Motorola Sonic Sub 240 speaker.
7. Warranty and Support
7.1 Limited Warranty
This product comes with a limited warranty. Please refer to the warranty card included in your package for specific terms and conditions. Keep your proof of purchase for warranty claims.
7.2 Customer Support
For further assistance, technical support, or warranty inquiries, please visit the official Motorola support website or contact their customer service. You can find more information at the Motorola Brand Store on Amazon or through your regional Motorola support channels.







