BOSS MC900B Bluetooth 4-Channel Amplifier

Quick Installation Guide

Thank you for purchasing the BOSS MC900B Bluetooth Amplifier. This manual provides instructions for proper operation and installation.

Package Contents

• 1 - MC900B Bluetooth 4-Channel Amplifier
• 1 - Multi-Function Controller
• 1 - Flush Mount Bezel
• 1 - Handlebar Mounting Bracket & Hardware Kit
• 1 - Power Harness
• 1 - User Manual
• 1 - Warranty Card

Before You Start

Important Safety Precautions

• Do not turn up the volume so high that you cannot hear your surroundings.
• Use caution or temporarily discontinue use in potentially hazardous situations.
• Do not operate mobile video equipment while driving; prioritize safe driving.
• Set volume at a low setting and slowly increase it to a comfortable level without distortion.
• If you notice smoke, strange noises, or odor, immediately turn off the power and consult a dealer or authorized BOSS AUDIO Service Center.

Installation Precautions

• Always consult with a professional installer.
• Do not attempt to install or service this product yourself without professional training.
• Refer any repairs to a qualified BOSS AUDIO SYSTEMS Service Center.
• The MC900B should be powered directly to the vehicle's battery.
• When wiring directly to the battery, disconnect the negative terminal wire first.
• If extending the main power wire, use an optional fuse and fuse holder (not included) with a minimum rating of 20 Amperes inline with the positive battery terminal.
• The ground cable length should not exceed 18 inches.
• The MC900B is weather-resistant but should not be submerged in water.
• Use only the installation parts provided with the MC900B.
• CAUTION: Using other mounting methods may void this warranty.

Wire Diagram

The following describes the connections for the MC900B amplifier:

• Pre-Amp Output: RCA connectors for Left (White) and Right (Red) channels.
• Aux Input: RCA connectors for Left (White) and Right (Red) channels.
• Remote Control: Connection port for the remote controller.
• USB Charging: Port for charging devices (5V 1A MAX).
• Speaker Outputs: Connections for 4-ohm speakers (Left Channel 1, Right Channel 1, Left Channel 2, Right Channel 2).
• Optional Backlighting Control: Orange wire. Do not ground or connect to +12V.
• Ground Cable: Connect to a chassis ground point or metal frame.
• Power Connections:
  • +12V Yellow: Battery connection.
  • +12V Red: Ignition connection.
  • +12V Blue: Remote Out (500mA MAX).
• Fuse: 15 Amp (Replace with ATO Fuse Type Only).
• Antenna: Pink wire. Do not cut or ground.

CAUTION: Do not ground or short the PINK antenna wire.

Before Installing This Product

To prevent electrical shorts, disconnect the negative battery cable before installation. Use this unit with a 12-volt battery and negative grounding only. Failure to do so may result in fire or malfunction.

When replacing the fuse, use only the specified rating. Cover any disconnected leads with insulating tape to prevent short circuits. Ensure the ground cable is properly connected to metal parts of the vehicle's body frame or directly to the battery if the chassis is not grounded. Connect the amplifier's ground cable and any second powered system's ground cable separately to the frame.

Technical Support

Phone: 1-800-999-1236

Website: www.bossaudio.com/support

Tools Needed

• Wrench and/or Pliers
• #2 Phillips screwdriver
• Crimp tool
• Electrical tape

Suggested Mounting Methods

The MC900B can be mounted in three configurations:

1. Flush Mount: Requires a cutout with dimensions 3-3/16" W x 1-11/16" H (82mm x 43mm).
2. Surface Mount: Uses recessed screw holes in the bezel for the included oval-head screws.
3. Handlebar Mount: Use the provided pan-head screws and stainless steel clamp. Securely tighten the clamp to fit your application.

Tip: To release the MC900B controller from the mounting bezel, insert a small jeweler's screwdriver into the left/right slots of the bezel.

Getting Started

Getting to Know Your MC900B Multifunction Controller (MFC)

• 1 MFC - Multifunction Controller
• 2 Power / Source: RED = AUX-IN Mode / BLUE = BT Mode
• 3 Volume Up
• 4 Next Track / Fast Forward
• 5 Play/Pause
• 6 Volume Down
• 7 Previous Track / Fast Rewind
• 8 Bluetooth Pairing Indicator - BLUE Color

Bluetooth Operation

Pairing & Discovering a New Bluetooth Connection

1. Power on the MC900B by pressing and holding the Power [▶️/SRC] button for 2 seconds. The Bluetooth blue LED will flash, and a confirmation tone will be heard, indicating it's ready for pairing.

Note: You have 2 minutes to complete pairing.

2. With the MC900B in pairing mode:

• Android Users: Go to Settings > Bluetooth Menu > SCAN. Select "MC900B" under AVAILABLE DEVICES. Enter passcode "0000" if prompted.
• iOS Users: Go to Settings > Bluetooth Menu. Select "MC900B". Enter passcode "0000" if prompted.

3. If "MC900B" is not visible, refresh the "Device List".

4. A confirmation tone will sound upon successful connection. You can now stream music.

Reconnection

1. Power on the MC900B and your last paired Bluetooth device.

2. The unit will automatically reconnect, and a confirmation tone will be heard.

3. If your device was previously paired but not the last one: Ensure no other devices are paired, go to your device's Bluetooth Menu, select "MC900B" under AVAILABLE DEVICES to reconnect.

4. If the device is out of range, it will disconnect. To reconnect, press the Power [▶️/SRC] button once when the device is back in range.

Clearing Previously Paired Devices Memory

1. Quickly press the Power [▶️/SRC] button twice. All BLUE LEDs will flash.

2. Press and hold the Play/Pause [▶️/⏸️] button for 10 seconds. A confirmation tone will be heard, LEDs will stop flashing, and only the BT LED will flash.

3. Pair a new device as described above.

Tip: To avoid battery exhaustion, run the vehicle's engine while using the product.

Streaming Music

Multifunction Controller Bluetooth Operation

1. Press the Play/Pause [▶️/⏸️] button to start or pause music. You can also use the PLAY button on your device.

2. To skip tracks forward, press the Next Track [⏭️] button. Press and hold for fast forward.

3. To skip tracks backward, press the Previous Track [⏮️] button. Press and hold for fast rewind.

Volume Control

1. To raise volume, press the Volume Up [?+] button.

2. To lower volume, press the Volume Down [?-] button.

Tip: Set the Bluetooth volume level on your device to its 100% level.

Aux-Input

Aux-In Operation

The MC900B can play audio from any device with a 3.5mm headphone audio jack.

1. Power on the MC900B by pressing and holding the Power [▶️/SRC] button for 2 seconds.

2. Short press the Power [▶️/SRC] button again. The controller LED will turn RED, indicating AUX-IN mode.

3. Bluetooth devices will remain paired even in AUX-IN mode.

4. Connect the amplifier's integrated RCA AUX-IN cable to a 3.5mm adaptor (adaptor not included).

5. Route audio wires securely.

Volume Control

1. To raise volume, press the Volume Up [?+] button.

2. To lower volume, press the Volume Down [?-] button.

3. To mute/unmute volume, press the Play/Pause [▶️/⏸️] button.

Tip: Set the headphone volume level on your device to its 100% level.

Information to the User

FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) it may not cause harmful interference, and (2) it must accept any interference received, including interference that may cause undesired operation.

This transmitter must not be co-located or operated with any other antenna or transmitter. The Bluetooth antenna cannot be removed or replaced by the user. This equipment complies with FCC/IC radiation exposure limits for an uncontrolled environment and meets FCC radio frequency (RF) Exposure Guidelines and RSS-102 of IC radio frequency (RF) Exposure rules. It is desirable that the equipment be installed and operated with the radiator at least 20 cm from a person's body.

Note: This equipment has been tested and found to comply with Class B digital device limits. These limits provide reasonable protection against harmful interference in residential installations. If interference occurs, try relocating the antenna, increasing separation, or connecting to a different circuit.

CAUTION: ADJUSTMENT OR ALTERATIONS OF THIS DEVICE MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Troubleshooting Guide

Specifications

Bluetooth

• BT: 4.0
• BT Range: 33Ft / 10M (Class 2)
• BT Profiles: A2DP

Amplifier

• Channels: 4
• MAX Continuous Output: 500W (All channels driven)
• PEAK Power Rating: 4Ω: 125W/channel
• RMS Total Power Output: 150W
• Class: AB
• Frequency response: 20-25kHz
• 4Ω stable
• Input impedance: 22k Ohm

Chassis

• Chassis Dimensions HxDxW: 1.75"x 7.8" x 3.8" / 44.5mm x 198mm x 96.5mm
• Controller Dimensions HxDxW: 0.81"x 3.75" x 1.85" / 20.5mm x 95.2mm x 47mm
• Controller cable length: 20ft / 6m
• Backlight illumination control wire
• Quick connect Molex power harness

General

• Power source: 14.4VDC (10.8V ~ 16V allowable)
• Grounding System: Negative type
• Maximum Current Consumption: 15A
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• USB output voltage: 5VDC @ 1A
• Unit Weight: 2.08lbs / 0.94kg
• Storage Temperature: 5°F to 113°F / -15°C to 45°C
• Operation Temperature: 14°F to 104°F / -10°C to 40°C
• Replacement Fuse: 15A (Replace with ATO Fuse Type Only)

Specifications subject to change without notice.