Can a Mono Amplifier Power Two Subwoofers?

Can a mono amplifier power two subwoofers? The short answer is yes, but there are a number of factors that must be taken into consideration before connecting multiple speakers to an amplifier.

Impedance

A mono amplifier, commonly referred to as a "monoblock," or a "single channel" amplifier, can be used to power two or more subwoofers as long as the total impedance of the subwoofers is greater than the minimum impedance the amplifier is rated for.

Checking Impedance

Always verify the total impedance of the speakers you connect to an amplifier with a volt-ohm meter or a digital multi-meter.

Subwoofer Wiring

When connecting subwoofers to an amplifier, there are a number of wiring options available. The proper wiring method will vary depending on the application. The amplifier's user manual should have illustrations of various wiring schemes, and should be consulted to find the configuration best suited for you.

Multiple Voice Coils

Many subwoofers have multiple voice coils, each needing to be powered by the amplifier in order to operate correctly. This can make impedance matching fairly complicated, but can also help insure a proper load on the amplifier.

Warning

Always make sure that you have the proper tools, equipment and experience before installing or modifying your car stereo. If a problem arises or you have additional questions, consult a professional.