The term PART OF A SOUND SYSTEM can be summarized as speakers, which are 8 letters long. Speakers are a key component of a sound system, as they are responsible for producing the sound that is heard. They are typically connected to an amplifier, which amplifies the sound and sends it to the speakers. Speakers come in a variety of shapes and sizes, and can be used for a variety of purposes, such as home theater systems, car audio systems, and public address systems.