Assertion: speaker's cabinet | /r/HasProperty | single wooden
Facets:
Source sentences:
text: While small combo keyboard amps with mic inputs became widely available on the market in the 2000s (decade), and were promoted as an innovation, in fact, the first portable PA systems sold in the 1920s and 1930s were "combo" systems, in which a power amplifier and speaker were combined in a single wooden cabinet.