Assertion: speaker | /r/CapableOf | use tweeter
Facets:
value: for a time
type: TEMPORAL
value: during the 1970s
type: TEMPORAL
value: during 1980s
type: TEMPORAL
value: to turn voltage
type: PURPOSE
Source sentences:
text: Speakers use drivers, including woofers, tweeters and midrange cones, to turn voltage into sound.
text: At the very least, such a loudspeaker may be 2-way employing a woofer (or mid-range/mid-woofer) and a tweeter.
text: ESS, a California manufacturer, licensed the design, employed Heil, and produced a range of speaker systems using his tweeters during the 1970s and 1980s.
text: Lafayette Radio, a large US retail store chain, also sold speaker systems using such tweeters for a time.