: The "box" that houses the drivers. It plays a critical acoustic role by preventing sound waves from the back of the driver from canceling out those from the front.
: Provides the electrical power needed to move the speaker drivers. Active speakers have built-in amps, while passive speakers require an external one. Common Types of Systems 36 Types of Speakers: The Comprehensive Guide speaker system
: Specialized drivers for ultra-low frequencies (usually below 100 Hz). : The "box" that houses the drivers