The right amplifier depends on the RMS power rating and impedance of your speakers or subwoofer. Matching these specifications helps your system play louder and cleaner without damaging your equipment. A professional installer can properly match an amplifier to your system and listening goals.
Check the subwoofer’s RMS power rating and impedance, measured in ohms, and compare them with the amplifier’s output at that impedance. The way multiple subwoofers or voice coils are wired can also change the load on the amplifier, so proper system matching is important.
Ohms measure electrical resistance, or impedance. Car audio speakers and subwoofers are commonly rated at 1, 2, or 4 ohms. An amplifier produces different amounts of power at different impedance levels, and operating below its rated impedance can cause overheating, shutdown, or damage. A properly matched system ensures your amplifier operates safely while delivering the power your speakers or subwoofers need.
