Assertion: speaker | /r/HasProperty | center
Facets:
Source sentences:
text: The most common surround sound specification, the ITU's 5.1 standard, calls for 6 speakers: Center (C) in front of the listener, Left (L) and Right (R) at angles of 60° on either side of the center, and Left Surround (LS) and Right Surround (RS) at angles of 100–120°, plus a subwoofer whose position is not critical.
text: You'd draw lines on the baffle of the enclosure, crossing at the point where you want the speaker to be centered.