Assertion: speaker's frequency range | /r/HasProperty | 20–200 hz
Facets:
value: for consumer products
type: PURPOSE
Source sentences:
text: The typical frequency range for a subwoofer is about 20–200 Hz for consumer products, below 100 Hz for professional live sound, and below 80 Hz in THX-approved systems.
text: (it's actually somewhere between a a subwoofer and a bass woofer, it's frequency range is 20 to 200 Hz).