Stereo components are the individual parts that make up a stereo system. RECEIVERS (9 letters) are the main control unit of a stereo system, allowing users to select sources and adjust sound levels. Woofers (7 letters) are speakers that produce low-frequency sounds. TWEETERS (8 letters) are speakers that produce high-frequency sounds. Preamps (7 letters) are devices that amplify signals before they reach the amplifier. Tuners (6 letters) are devices that allow users to tune into radio stations. Amps (4 letters) are devices that amplify audio signals. Speakers (8 letters) are devices that convert electrical signals into sound waves.