How to Wire a Stereo Amplifier to a Bridged Mono
Quality car amplifiers usually have the option of bridging. This takes both channels of a stereo amplifier and combines the output to a larger output, ideal for driving subwoofers or other loads requiring more power. Bridging an amplifier typically more than doubles the output capability of an amplifier, creating a situation where a modestly appointed stereo piece can be quickly and easily converted to a powerhouse. For an amplifier already installed, converting to bridged mono is simple.
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Instructions
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Turn the system off. Locate the speaker wire terminals on the amplifier. Make note of the "Bridged" labeling, located immediately above or below the speaker wire terminals.
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Use the appropriate screwdriver to loosen the terminal screws and remove the wires. Twist the positive wires together, then the negative wires. Usually the positive leads have writing or a molded ridge on the jacket to indicate polarity.
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Insert the twisted wires back into the appropriate speaker terminals. On most amplifiers, the positive leads will be placed into the "Left" terminal, while the negative wires will go into the "Right" terminals. Tighten all speaker wire terminal screws back down to secure the wires.
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Tips & Warnings
Never make speaker wire or other connections while the car stereo is tuned on. Short circuits may occur, potentially damaging the amplifier or speaker(s).
References
Resources
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