Assertion: speaker's driver | /r/CapableOf | extend the range
Facets:
Source sentences:
text: The early Western Electric experiments added a set of 18" drivers for the low end in a large, open-backed baffle (extending the range down to 50 Hz) and a high-frequency unit, but MGM was not pleased with the sound of the three-way system, as they had concerns about the delay between the different drivers.