Assertion: subwoofer | /r/HasProperty | a type of speaker
Facets:
Source sentences:
text: A subwoofer is a type of speaker that reproduces only the lowest of audible frequencies.
text: Subwoofer is a type of loudspeaker that is designed to produce low frequencies, example 20 - 200 Hz.
text: A subwoofer is a type of speaker specifically used to produce low-end bass frequencies.