Assertion: speaker enclosure | /r/HasProperty | modified in this way
Facets:
Source sentences:
text: During the 1940s swing era, to get deeper bass, "pipelike opening[s]" were cut into speaker enclosures, creating bass reflex enclosures, as it was found that even a fairly inexpensive speaker enclosure, once modified in this way, could "transmit the driving power of a heavy...drumbeat—and sometimes not much else—to a crowded dancefloor.