Assertion: receiver's power | /r/HasProperty | insufficient
Facets:
value: typically
type: DEGREE
value: to drive a loudspeaker
type: PURPOSE
Source sentences:
text: Although the low power produced by crystal radios is typically insufficient to drive a loudspeaker, some homemade 1960s sets have used one, with an audio transformer to match the low impedance of the speaker to the circuit.