A subwoofer is a loudspeaker designed to reproduce low-pitched audio frequencies, typically below 200 Hz, which are not audible by most loudspeakers. Subwoofers are used in home audio systems, car audio systems, and professional sound reinforcement systems.
Checking a subwoofer is important to ensure that it is working properly and to identify any potential problems. There are a few different ways to check a subwoofer, depending on the type of subwoofer and the equipment you have available.