Assertion: powered subwoofer | /r/HasAspect | their own built-in amplifiers
Facets:
Source sentences:
text: However, Powered subwoofers are by far the most commonly used as they have their own built-in amplifiers and are not dependent on any amplifier limitations of another receiver or amplifier.
text: Powered subwoofers are external speakers that have their own built-in amplifiers and do not depend on any additional amplifiers or receivers.