1. Introduction
This manual provides essential instructions for the safe and efficient operation of your RCA SB642BT LED Soundbar. Please read this manual thoroughly before using the product and retain it for future reference.
Package Contents:
- RCA SB642BT Soundbar
- Remote Control
- AC Power Adapter
- 3.5mm Audio Cable
- User Manual (this document)
2. Important Safety Information
Always follow basic safety precautions when using this product to reduce the risk of fire, electric shock, and injury to persons.
- Do not expose this appliance to rain or moisture.
- Do not block any ventilation openings.
- Do not install near any heat sources.
- Protect the power cord from being walked on or pinched.
- Only use attachments/accessories specified by the manufacturer.
- Unplug this appliance during lightning storms or when unused for long periods.
- Refer all servicing to qualified service personnel.
3. Product Overview
The RCA SB642BT is a 50-watt Hi-Fi soundbar designed to enhance your audio experience. It features multiple connectivity options and integrated LED lighting.
Front View:

Image Description: A black RCA SB642BT soundbar viewed from the front, with the RCA logo on the left. A small black remote control is positioned next to it. The soundbar has a sleek, rectangular design with a speaker grille covering the front.
The front of the soundbar features the main speaker grille and integrated control buttons on the top surface. The RCA logo is visible on the left side.
Rear View and Connections:

Image Description: The rear panel of the RCA SB642BT soundbar, displaying various input ports. These include USB, Optical Digital, HDMI, and Aux 3.5mm connections, along with the power input. A product label is also visible.
The rear panel houses all input and power connections. These include USB, Optical Digital, HDMI, and a 3.5mm Auxiliary input. Ensure cables are connected securely.
Dimensions:

Image Description: A diagram illustrating the dimensions of the RCA SB642BT soundbar. The length is shown as 85 cm, the height as 7.5 cm, and the depth as 10 cm.
- Length: 85 cm
- Height: 7.5 cm
- Depth: 10 cm
4. Setup
4.1 Placement
Place the soundbar on a stable, flat surface, preferably directly in front of your television or display. Ensure there is adequate space around the unit for proper ventilation.

Image Description: The RCA SB642BT soundbar positioned on a cabinet directly beneath a television screen. The soundbar's LED lights are illuminated, indicating operation. This illustrates a typical setup configuration.
4.2 Connecting to Power
- Connect the AC power adapter to the DC IN port on the back of the soundbar.
- Plug the other end of the power adapter into a wall outlet.
- The soundbar will enter standby mode.
4.3 Audio Connections
Choose one of the following methods to connect the soundbar to your audio source (e.g., TV, computer, smartphone).
- HDMI (ARC): If your TV supports HDMI ARC, connect an HDMI cable from the HDMI ARC port on your TV to the HDMI port on the soundbar. This allows audio to be sent from the TV to the soundbar and often enables control of the soundbar with your TV remote.
- Optical Digital: Connect an optical cable from the OPTICAL OUT port on your TV or audio source to the OPTICAL IN port on the soundbar.
- 3.5mm Auxiliary: Connect the supplied 3.5mm audio cable from the headphone jack or AUX OUT port on your device to the AUX IN port on the soundbar.
- USB: Insert a USB flash drive containing audio files into the USB port on the soundbar. The soundbar will automatically switch to USB mode and begin playback.
- Bluetooth: For wireless connection, refer to the "Bluetooth Pairing" section in Operating Instructions.
5. Operating Instructions
5.1 Power On/Off
- Press the POWER button on the remote control or on the top panel of the soundbar to turn the unit on or off.
5.2 Selecting Input Source
- Press the INPUT button on the remote control or on the top panel of the soundbar repeatedly to cycle through available input sources: HDMI, OPTICAL, AUX, USB, BLUETOOTH.
- The current input source will be displayed on the LED indicator.
5.3 Volume Control
- Press VOL+ to increase volume and VOL- to decrease volume.
- Press the MUTE button to temporarily silence the audio. Press again to restore sound.
5.4 Bluetooth Pairing
- Turn on the soundbar and select BLUETOOTH mode using the INPUT button. The LED indicator will flash, indicating pairing mode.
- Enable Bluetooth on your mobile device (smartphone, tablet, etc.).
- Search for "RCA SB642BT" in the list of available devices and select it to pair.
- Once paired, the LED indicator will stop flashing and remain solid. You can now play audio from your device through the soundbar.
- The maximum Bluetooth range is approximately 10 meters (33 feet).
5.5 LED Lighting
The soundbar features integrated LED lights at the bottom. These lights can be controlled via the remote control (if a dedicated button exists, otherwise it's automatic or cycles with modes).

Image Description: The RCA SB642BT soundbar with its integrated LED lights illuminated in a multi-color display along the bottom edge. The LED display shows "3509", likely indicating a time or mode.
6. Maintenance
- Cleaning: Disconnect the power before cleaning. Use a soft, dry cloth to wipe the surface of the soundbar. Do not use liquid cleaners or aerosol sprays.
- Storage: If storing the soundbar for an extended period, unplug it from the power outlet and store it in a cool, dry place.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; Wall outlet not active | Ensure power cord is securely connected; Try a different outlet |
| No sound | Incorrect input source selected; Volume too low; Mute is active; Cables not connected properly | Select correct input source; Increase volume; Deactivate Mute; Check all audio cable connections |
| Bluetooth pairing fails | Soundbar not in pairing mode; Device too far; Interference | Ensure soundbar is in Bluetooth mode and flashing; Move device closer; Turn off other Bluetooth devices |
| Remote control not working | Batteries depleted; Obstruction between remote and soundbar | Replace remote control batteries; Remove any obstructions; Ensure remote is pointed at the soundbar's sensor |
8. Specifications
| Model: | SB642BT |
| Output Power: | 50 Watts RMS (25W x 2) |
| Audio Output Mode: | Stereo (2.0 Channel) |
| Frequency Response: | 150 Hz - 20 kHz |
| Connectivity: | Bluetooth, USB, Optical Digital, HDMI (ARC), 3.5mm Auxiliary |
| Bluetooth Range: | Up to 10 meters (33 feet) |
| Dimensions (L x H x D): | 85 cm x 7.5 cm x 10 cm |
| Material: | Plastic |
| Power Source: | AC Power Adapter |
| Included Accessories: | Remote Control, AC Power Adapter, 3.5mm Audio Cable |
9. Warranty and Support
This RCA SB642BT Soundbar comes with a 1-year limited warranty from the date of purchase. This warranty covers manufacturing defects in materials and workmanship under normal use.
For warranty claims or technical support, please contact RCA customer service. Keep your proof of purchase for warranty validation.
Note: The warranty does not cover damage caused by misuse, accident, unauthorized modification, or external causes such as power surges.





