BOSS Audio Systems MC420B Motorcycle Speaker and Amplifier Sound System User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your BOSS Audio Systems MC420B Motorcycle Speaker and Amplifier Sound System. Please read this manual thoroughly before installation and use to ensure proper functionality and safety. The MC420B system includes two 3-inch chrome full-range speakers and a Class D amplifier, designed for motorcycles, ATVs, and UTVs.

2. Safety Information

Always observe the following safety precautions:

• Professional installation is highly recommended to ensure proper and safe functionality.
• Do not operate the system at excessively high volumes that may impair your ability to hear traffic sounds or emergency vehicles.
• Ensure all wiring is properly insulated and secured to prevent short circuits and damage.
• The system is weatherproof, but not fully waterproof. Avoid submerging the components in water.
• Disconnect the vehicle's battery before beginning any electrical installation.

3. Package Contents

Verify that all items are present in your package:

• 2 x 3-inch Chrome Full Range Speakers
• 1 x Class D Amplifier (MC420B)
• 1 x In-line Volume Control
• Mounting Hardware (Adjustable brackets, protective rubber inserts, screws, washers)
• Wiring Harness

Image showing all components included in the BOSS Audio Systems MC420B package, including speakers, amplifier, volume control, and mounting hardware.

4. Specifications

Detailed dimensions for the MC420B speakers and amplifier, showing measurements in inches and millimeters.

5. Setup and Installation

Before installation, ensure your vehicle's battery is disconnected. Professional installation is recommended.

5.1 Speaker Placement

Mount the two 3-inch speakers on your vehicle's handlebars using the adjustable brackets and protective rubber inserts. The brackets are designed to fit handlebars ranging from 0.75" to 1.25" in diameter. Ensure speakers are securely fastened and do not obstruct controls or visibility.

The MC420B speakers are shown mounted on motorcycle handlebars, demonstrating typical placement.

5.2 Amplifier Installation

The compact Class D amplifier should be mounted in a secure, dry location, away from direct heat and moisture. Connect the speaker wires to the amplifier outputs. The amplifier is weatherproof, but protecting it from direct water spray is advisable.

A diagram illustrating the connections between the in-line volume controller, amplifier, and speakers for the MC420B system.

5.3 Wiring Connections

1. Power Connection: Connect the red power wire from the amplifier to the vehicle's 12V battery (positive terminal). It is recommended to use an in-line fuse (not included) for protection.
2. Ground Connection: Connect the black ground wire from the amplifier to a suitable chassis ground point on the vehicle.
3. Speaker Connections: Connect the speaker wires from the speakers to the corresponding outputs on the amplifier. Ensure correct polarity.
4. Volume Control: Install the in-line volume control in an easily accessible location on your handlebars. This also functions as the power switch for the system.

Note: Some users prefer to wire the power to an ignition-switched source to prevent battery drain when the vehicle is off. If wired directly to the battery, remember to turn off the system using the in-line volume control.

6. Operating Instructions

6.1 Powering On/Off

To power on the system, rotate the in-line volume control knob clockwise. To power off, rotate it counter-clockwise until it clicks.

6.2 Bluetooth Pairing

1. Ensure the MC420B system is powered on.
2. On your smartphone or MP3 device, enable Bluetooth and search for available devices.
3. Select "BOSS Audio MC420B" from the list of devices.
4. Once paired, you will hear an audible confirmation, and the Bluetooth indicator light on the amplifier will illuminate.
5. You can now stream audio wirelessly from your device.

A motorcycle equipped with the MC420B system, showing a smartphone connected via Bluetooth for wireless audio streaming.

6.3 Auxiliary Input

For devices without Bluetooth, connect them to the 3.5mm Auxiliary input located on the side of the amplifier using a standard 3.5mm audio cable (not included).

7. Maintenance

• Regularly inspect all wiring connections for tightness and signs of wear or corrosion.
• Clean the speakers and amplifier with a soft, damp cloth. Avoid using harsh chemicals or abrasive cleaners.
• While weatherproof, it is advisable to cover the system during prolonged periods of heavy rain or extreme weather conditions to extend its lifespan.

The MC420B speakers on a motorcycle, covered in water droplets, highlighting their weatherproof construction.

8. Troubleshooting

9. Warranty and Support

BOSS Audio Systems provides a 3-year online dealer warranty when the purchase is made through Amazon.com. For warranty claims or technical support, please contact BOSS Audio Systems customer service or visit their official website. Keep your proof of purchase for warranty validation.

10. Product Videos