Infinity INF-BC4
Infinity INF-BC4 Bluetooth Receiver/Controller User Manual
Model: INF-BC4
Introduction
Thank you for purchasing the Infinity INF-BC4 Bluetooth Receiver/Controller. This device is designed to add Bluetooth audio streaming capabilities and rotary control to your audio system, suitable for marine, powersports, and other outdoor applications. It features IPx6 water resistance for durability in challenging environments. This manual provides detailed instructions for installation, operation, and maintenance to ensure optimal performance and longevity of your product.
Safety Information
- Always disconnect the vehicle's battery negative terminal before beginning any installation.
- Ensure all wiring is properly insulated and secured to prevent short circuits and damage.
- Do not operate the device in a manner that distracts you from safe operation of your vehicle or vessel.
- Consult a qualified professional if you are unsure about any installation steps.
- This product requires an external amplifier for audio output. Do not connect speakers directly to the unit.
Package Contents
Verify that all items are present in the package:
- Infinity INF-BC4 Bluetooth Receiver/Controller
- Mounting Hardware (if applicable, not explicitly listed but implied for installation)
- Wiring Harness
- User Manual (this document)
Product Overview
The INF-BC4 features a compact design with intuitive controls for seamless audio management.

Figure 1: Front Panel Controls
This image displays the front face of the Infinity INF-BC4 Bluetooth Receiver/Controller. It features a central rotary knob for volume control, surrounded by buttons for Play/Pause, Power (PWR), and Track Skip (forward and backward). The Infinity logo is visible at the bottom.
- Rotary Knob: Controls volume (turn) and power (push PWR).
- Play/Pause Button: Initiates or pauses audio playback.
- Track Skip Buttons: Navigates to the previous or next track.
- PWR Button: Powers the unit on or off.
Installation
Mounting the Unit
The INF-BC4 is designed for simple installation, fitting into a 1-3/8 inch (approximately 35mm) hole. Choose a flat, secure surface for mounting.
- Select a suitable mounting location that is flat and provides sufficient clearance behind the panel for wiring.
- Drill a 1-3/8 inch (35mm) diameter hole at the chosen location.
- Insert the INF-BC4 into the drilled hole from the front of the panel.
- Secure the unit from the rear using the supplied mounting nut, tightening it until the unit is firmly in place.

Figure 2: Side View with Wiring Harness
This image shows the Infinity INF-BC4 Bluetooth Receiver/Controller from a side angle, highlighting the main body and the attached wiring harness. The wires are color-coded for different connections, extending from the rear of the unit.
Wiring Connections
The INF-BC4 requires an external amplifier for audio output. Ensure all connections are secure and properly insulated.

Figure 3: Rear Panel Wiring
This image provides a view of the rear of the Infinity INF-BC4 Bluetooth Receiver/Controller, detailing the various wiring connections. Multiple color-coded wires are visible, indicating power, ground, and audio output connections.
- Red Wire (+12V ACC): Connect to a switched +12V accessory power source. This allows the unit to turn on and off with your vehicle's ignition.
- Yellow Wire (+12V Constant): Connect to a constant +12V power source. This maintains settings and memory.
- Black Wire (Ground): Connect to a reliable chassis ground point.
- Blue Wire (Remote Out): Connect to the remote turn-on input of your external amplifier. This will turn on the amplifier when the INF-BC4 is powered on.
- RCA Output Cables: Connect these to the RCA input jacks of your external amplifier. Ensure correct left and right channel connections.
Operation
Powering On/Off
- To power on the unit, press the PWR button. The unit will automatically connect to the last paired device if it's within range.
- To power off the unit, press and hold the PWR button for approximately 3 seconds.
Bluetooth Pairing
- Ensure the INF-BC4 is powered on.
- On your mobile device, navigate to the Bluetooth settings.
- Search for available devices. The INF-BC4 will appear as "Infinity BC4" or similar.
- Select the INF-BC4 to initiate pairing. Once paired, a confirmation tone may sound, and the device name will show as connected.
Note: Only one Bluetooth device can be connected at a time. To connect a new device, disconnect the currently paired device from its Bluetooth settings.
Audio Control
- Volume Control: Rotate the central knob clockwise to increase volume and counter-clockwise to decrease volume.
- Play/Pause: Press the Play/Pause button to toggle playback.
- Track Skip: Press the Track Forward button to skip to the next track. Press the Track Backward button to go to the beginning of the current track or the previous track.
Maintenance
- Cleaning: Use a soft, damp cloth to clean the surface of the unit. Avoid abrasive cleaners or solvents.
- Water Resistance: The unit is IPx6 water resistant, meaning it can withstand powerful water jets. However, it is not designed for submersion. Ensure all connections are properly sealed during installation to maintain water resistance.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Incorrect wiring; Blown fuse; No power to accessory/constant wire. | Check all power and ground connections. Verify fuse integrity. Ensure vehicle ignition is on if connected to accessory power. |
| No audio output | Unit not paired; Amplifier not powered on; Incorrect RCA connections; Amplifier volume too low. | Ensure Bluetooth device is paired and playing. Check amplifier power and remote turn-on connection. Verify RCA cables are connected correctly to the amplifier. Increase amplifier gain/volume. |
| Cannot pair Bluetooth device | Unit in pairing mode; Another device already connected; Device out of range. | Ensure the INF-BC4 is powered on and not connected to another device. Move your device closer to the INF-BC4. Try restarting both the INF-BC4 and your mobile device. |
| Intermittent audio or poor sound quality | Bluetooth interference; Device too far; Loose connections. | Reduce distance between device and INF-BC4. Avoid obstacles. Check all wiring connections for looseness or corrosion. |
Specifications
| Model Number | INF-BC4 |
| Brand | Infinity |
| Connectivity Technology | Bluetooth |
| Controller Type | Rotary Control |
| Special Feature | Wireless |
| Compatible Devices | Smartphone, Marine Stereo, External Amplifier |
| Connector Type | 3.5mm Jack |
| Audio Output Mode | Stereo |
| Surround Sound Channel Configuration | 2.0 |
| Water Resistance | IPx6 |
| Mounting Hole Size | 1-3/8 inches (approx. 35mm) |
| Product Dimensions | 7 x 3 x 3 inches |
| Item Weight | 6.4 ounces |
Note: Specifications are subject to change without notice. The unit features RCA outputs for connection to an external amplifier, despite the '3.5mm Jack' listing in some specifications.
Warranty and Support
Infinity products are designed and manufactured to the highest quality standards. For detailed warranty information and technical support, please refer to the warranty card included with your product or visit the official Infinity website. Keep your proof of purchase for warranty claims.
For further assistance, contact Infinity customer service.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.


