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Thank you for choosing our product! Please read the instructions carefully so you will know how to operate your product properly. If there are any technical questions, please contact: Customer care: (805) 751-4853 & Live chat Online support: www.bossaudio.com/support IMPORTANT Please enter below the Serial No.
Table of Contents Introduction .................................2 Package contents ...............................2 Important ................................3 Function controller overview ..........................4 Wiring .................................5 Mounting ................................6 Button backlight illumination ..........................7 Bluetooth streaming ............................7 Audio input from a mobile phone ........................8 Audio input from other devices ...........................9 USB charging ..............................9 Audio output ..............................9 Troubleshooting ..............................10 Specifications ..............................11...
Important Read and understand all instructions before you use your product. If you do not follow the instructions in this manual, we are not responsible for any resulting personal injury or damage to property. This will also void the warranty. Important Safety Precautions •...
Function controller overview /SRC • Press and hold to switch the unit on or to standby. • Press to select Bluetooth or AUX input mode when switched on. When Bluetooth mode is selected, the button backlights are illuminated blue; when AUX input mode is selected, the button backlights are illuminated red.
Wiring See the section “Installation Precautions”. Disconnect the negative terminal of the vehicle battery prior to wiring. Connect the unit to a 12VDC battery and negative ground only. Connect speaker wires to speakers with 4 - 8 Ω. Never ground or short the speaker wires. Insulate all bare wires and unconnected wires with electrical tape.
Mounting See the section “Installation Precautions”. Use only installation parts provided with the product. Before you drill or cut any holes, investigate your vehicle’s layout very carefully. Take special care when you work near the fuel tank, fuel lines, hydraulic lines and electrical wiring. Make sure there is sufficient air circulation around the intended mounting location.
Bluetooth pairing mode. On your mobile device, enable Bluetooth then select “Boss Audio MC900B” to pair the unit with your mobile device. If prompted for password, input “0000” on your mobile device.
• For a mobile phone with a USB-C port, use a USB-C to RCA cable (not included). • For an iPhone, use a lightning to RCA cable (not included). 3.5mm cable USB-C cable MC900B AUX-IN 4 CHANNEL BLUETOOTH ® POWER AMPLIFIER...
Audio input from other devices This unit can also play audio from a playback device (e.g. CD/DVD player or VCR). /SRC on the function controller to switch on the unit. Then press briefly /SRC to Press and hold select AUX input mode. - When the unit is in AUX input mode, the button backlights will illuminate red.
Troubleshooting If you have problems using this product, check the following points before you request service. If you still have a problem, contact our technical support. Problem Solution No power/no button Check that the power cables (battery/ignition/ground) are properly connected backlighting (see the section “Wiring”).
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