Assertion: single subwoofer | /r/HasProperty | great
Facets:
value: in the 1970s
type: TEMPORAL
Source sentences:
text: Turntable rumble is also strongest in the vertical direction, so reproducing an LP with the low bass summed to mono eliminates most of the rumble and loses little or nothing that was on the LP in the first place, so single subwoofers were great in the 1970s.