Assertion: amplifier's input | /r/HasProperty | offered with option
Facets:
value: for green/blue speakers
type: TRANSITIVE-OBJECT
Source sentences:
text: As originally the case in the 1960s, Top Boost is offered as a retrofit upgrade and is not standard, and the original configuration 4/6 inputs are offered with options for Green/Blue speakers, the blue speakers being similar in appearance to the Celestion alnico speaker but made by Fane International with fiberglass voice coils, which allow them a much higher 100 watt power rating.