1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Memphis Audio SBT2 Bluetooth Controller. The SBT2 is designed to provide convenient control over your audio system, featuring Bluetooth connectivity, an auxiliary input, and a USB port for charging or media playback. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Safety Information
- Always disconnect the vehicle's battery before beginning any electrical installation.
- Ensure all wiring connections are secure and properly insulated to prevent short circuits.
- Mount the controller in a location that does not obstruct the driver's view or interfere with vehicle operation.
- Avoid exposing the unit to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture.
- Do not attempt to disassemble or modify the unit. This may void the warranty and cause damage.
3. Package Contents
Verify that all items are present in the package:
- Memphis Audio SBT2 Bluetooth Controller Unit
- Wiring Harness with Auxiliary Input and USB Port
- Mounting Hardware (if included)
- User Manual (this document)
4. Product Overview
The Memphis Audio SBT2 provides a compact and intuitive interface for managing your audio sources. It features illuminated controls for easy visibility.
Figure 4.1: Front view of the SBT2 control panel. This image displays the illuminated power button, track skip buttons, and the central rotary knob for volume control and selection.
Figure 4.2: Side view of the SBT2 controller unit, showing its compact design suitable for various mounting locations.
Control Functions:
- Power Button (⏻): Press and hold to power on/off. Short press to play/pause.
- Rotary Knob: Rotate to adjust volume. Press to select or confirm.
- Track Skip Buttons (⏮ / ⏭): Press to skip to the previous or next track.
5. Installation
Proper installation is crucial for optimal performance. If you are unsure about any steps, consult a professional installer.
5.1 Mounting the Controller
- Choose a suitable mounting location that is easily accessible and does not interfere with vehicle operation.
- Ensure there is sufficient space behind the mounting surface for the wiring harness.
- Use the provided mounting hardware to secure the SBT2 controller.
5.2 Wiring Connections
Refer to the wiring diagram below for detailed connections. All connections should be secure and properly insulated.
Figure 5.1: The complete wiring harness for the SBT2 controller, showing power, ground, auxiliary input, and USB connections.
- Red Wire (+12V Switched): Connect to a switched +12V power source (e.g., accessory wire) that turns on and off with the ignition.
- Black Wire (Ground): Connect to a solid chassis ground point.
- Yellow Wire (Constant +12V): Connect to a constant +12V power source for memory retention and consistent power.
- Blue Wire (Remote Out): Connect to the remote turn-on input of your amplifier or other audio components.
- Auxiliary Input (3.5mm Jack): Connect external audio devices using a 3.5mm audio cable.
- USB Port: Connect USB devices for charging or media playback (functionality depends on the connected head unit/amplifier).
6. Operation
6.1 Power On/Off
Press and hold the ⏻ button for approximately 3 seconds to power the unit on or off. The buttons will illuminate when the unit is powered on.
6.2 Bluetooth Pairing
- Ensure the SBT2 is powered on.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "Memphis SBT2" from the list of devices.
- Once paired, the unit will confirm connection, and you can stream audio wirelessly.
6.3 Auxiliary Input
Connect an external audio device (e.g., MP3 player, smartphone) to the 3.5mm auxiliary input jack using a standard audio cable. The SBT2 will automatically switch to the auxiliary input when a device is connected and playing audio.
6.4 USB Port
The USB port can be used for charging compatible devices or for connecting USB media storage, depending on the capabilities of your connected head unit or amplifier. Refer to your head unit's manual for USB media playback compatibility.
6.5 Audio Control
- Volume Adjustment: Rotate the central knob clockwise to increase volume, counter-clockwise to decrease.
- Track Navigation: Press the ⏮ button to go to the previous track. Press the ⏭ button to go to the next track.
- Play/Pause: Short press the ⏻ button to play or pause audio playback.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No power to the unit; incorrect wiring. | Check +12V (red and yellow) and ground (black) connections. Ensure the ignition is on if connected to a switched source. |
| Cannot pair via Bluetooth. | Bluetooth not enabled on device; unit not in pairing mode; interference. | Ensure Bluetooth is enabled on your device. Power cycle the SBT2. Move closer to the unit. Forget previous pairings on your device. |
| No audio output. | Volume too low; incorrect source selected; amplifier not powered on; faulty connections. | Increase volume on SBT2 and connected device. Ensure correct input is selected on your head unit/amplifier. Check remote turn-on (blue wire) connection to amplifier. Verify all audio connections. |
| Buttons are not responding. | Unit frozen; power issue. | Power cycle the unit by disconnecting and reconnecting power, or by holding the power button for an extended period (e.g., 10 seconds). |
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | SBT2 |
| Connectivity | Bluetooth, 3.5mm Auxiliary Input, USB |
| Power Requirement | 12V DC (Switched and Constant) |
| Item Weight | 7 ounces |
| Package Dimensions | 8.31 x 5.91 x 2.52 inches |
| Manufacturer | Memphis |
9. Maintenance
- Clean the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Ensure all connections remain secure over time, especially in environments with vibration.
10. Warranty and Support
For warranty information and technical support, please refer to the official Memphis Audio website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.
For further assistance, visit: Memphis Audio Official Website
