1. Safety Instructions
Please read these safety instructions carefully before using the device and keep them for future reference.
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not disassemble, repair, or modify the unit. This may cause damage, electric shock, or fire.
- Keep the speaker away from water and other liquids.
- Use only the provided USB charging cable and a compatible 5V DC power adapter (not included) for charging.
- Ensure proper ventilation around the speaker during use and charging.
- Do not touch the speaker cones directly, as this may cause damage.
2. Package Contents
Verify that all items are present in your package:
- Sylvania SP328 Portable Bluetooth Speaker
- USB Recharge Cable
- 3.5 mm AUX Audio Cable (50 cm)
- User Manual (this document)
3. Product Overview
The Sylvania SP328 Portable Bluetooth Speaker features dual 4-inch Hi-Fi speakers with blue LED backlights, offering both sound and visual appeal. It includes controls for volume, bass, and treble, along with multiple input options for versatile use.

Figure 1: Front view of the Sylvania SP328 Portable Bluetooth Speaker, showing its dual speakers, control panel, and overall dimensions (15.5 inches high, 8.2 inches wide, 7 inches deep).

Figure 2: Detailed view of the speaker's control panel, highlighting the Bass and Treble knobs, mode buttons, and the blue LED backlights on the speakers.
Control Panel Features:
- ON/OFF Switch: Powers the speaker on or off.
- DC 5V Input: For charging the speaker.
- Charging LED: Indicates charging status.
- Working Mode LED: Indicates the current operating mode (e.g., Bluetooth, Aux).
- AUX IN: 3.5mm input for connecting external audio devices.
- Volume Control: Adjusts the overall sound volume.
- Treble Control: Adjusts the high-frequency sound.
- Bass Control: Adjusts the low-frequency sound.
- Mode Button: Switches between input modes (Bluetooth, AUX, FM Radio).
- Playback Controls: Play/Pause, Skip Track (Forward/Backward).
4. Setup
4.1. Charging the Speaker

Figure 3: The speaker connected to a USB charging cable, illustrating the charging process and the built-in 800mAh lithium battery.
- Locate the DC 5V input port on the top panel of the speaker.
- Connect the small end of the provided USB charging cable to the DC 5V input port.
- Connect the standard USB end of the cable to a USB power source (e.g., a USB wall adapter, computer USB port, or power bank).
- The Charging LED will illuminate to indicate that the speaker is charging.
- Once fully charged, the Charging LED may change color or turn off, depending on the model. Disconnect the charging cable when charging is complete to preserve battery life.
4.2. Powering On/Off
- To power on the speaker, slide the ON/OFF switch to the 'ON' position. The Working Mode LED will light up.
- To power off the speaker, slide the ON/OFF switch to the 'OFF' position.
5. Operating Instructions
5.1. Bluetooth Pairing

Figure 4: A user interacting with the Sylvania SP328 speaker via Bluetooth, demonstrating its wireless connectivity and approximate 32-foot range.
- Ensure the speaker is powered on and in Bluetooth mode. The Working Mode LED will typically flash blue, indicating it is ready for pairing. If not, press the 'MODE' button until the Bluetooth indicator flashes.
- On your Bluetooth-enabled device (smartphone, tablet, laptop), go to the Bluetooth settings and enable Bluetooth.
- Search for available devices. The speaker will appear as 'SP328' or 'Sylvania SP328'.
- Select 'SP328' to connect. Once successfully paired, the Working Mode LED will stop flashing and remain solid blue, and you may hear an audible confirmation.
- You can now play audio from your device through the speaker.
5.2. Auxiliary Input
For devices without Bluetooth, use the 3.5mm AUX IN port.
- Connect one end of the provided 3.5mm AUX audio cable to the AUX IN port on the speaker.
- Connect the other end of the cable to the headphone jack or audio output of your external device.
- Press the 'MODE' button on the speaker until the Working Mode LED indicates AUX mode (often a red light).
- Play audio from your external device.
5.3. Adjusting Volume, Bass, and Treble
- Volume: Rotate the 'VOLUME' knob to increase or decrease the overall sound level.
- Bass: Rotate the 'BASS' knob to adjust the intensity of low-frequency sounds.
- Treble: Rotate the 'TREBLE' knob to adjust the intensity of high-frequency sounds.
5.4. Mode Selection
Press the 'MODE' button repeatedly to cycle through available input modes: Bluetooth, AUX, and FM Radio (if applicable).
Video 1: A demonstration of the Sylvania SP328 Portable Bluetooth Speaker's features, including its sound quality, bass and treble controls, and portability. This video provides a general overview of the product's functionality.
6. Maintenance
6.1. Cleaning
- Wipe the speaker with a soft, dry cloth.
- Do not use abrasive cleaners, waxes, or solvents.
6.2. Storage
- Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for an extended period, charge the battery periodically to maintain its health.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Battery is depleted. | Charge the speaker using the provided USB cable. |
| Cannot pair via Bluetooth. | Speaker is not in pairing mode or device Bluetooth is off. | Ensure speaker is in Bluetooth mode (flashing blue LED). Turn Bluetooth on your device and search for 'SP328'. |
| No sound from AUX input. | Incorrect mode selected or cable not fully inserted. | Press 'MODE' button to select AUX input. Ensure 3.5mm cable is securely connected to both devices. Check volume levels on both speaker and source device. |
| Sound is distorted. | Volume, Bass, or Treble levels are too high. | Reduce the volume, bass, or treble settings on the speaker or the connected device. |
| Bluetooth connection is unstable. | Device is out of range or interference. | Move the connected device closer to the speaker (within 10 meters/32 feet). Avoid obstacles between the devices. |
8. Specifications
- Model Name: SP328-BLACK
- Brand: Curtis (Sylvania)
- Material: Plastic
- Color: Black
- Speaker Type: Outdoor (Portable)
- Connectivity Technology: Bluetooth, Auxiliary
- Wireless Communication Technology: Bluetooth
- Bluetooth Range: 10 Meters (approximately 32 feet)
- Audio Output Mode: Stereo
- Speaker Size: 4 Inches (dual speakers)
- Speaker Maximum Output Power: 6 Watts
- Impedance: 1 Ohms
- Power Source: DC (Rechargeable Battery)
- Battery Type: 1 Lithium Ion battery required
- Battery Capacity: 800 Milliamp Hours
- Product Dimensions: 7"D x 8.2"W x 15.5"H
- Item Weight: 1 Pounds
- Control Method: Touch (buttons)
- Included Components: USB Recharge Cable, 3.5 mm AUX Audio Cable (50 cm)
- Is Waterproof: FALSE
9. Warranty and Support
This Sylvania SP328 Portable Bluetooth Speaker comes with a Limited Warranty.
For detailed warranty information, including terms, conditions, and how to make a claim, please refer to the warranty card included in your product packaging or contact Sylvania customer support.
For technical support or service inquiries, please visit the official Sylvania website or contact their customer service department using the contact information provided in your product documentation.





