Assertion: instrumentation amplifier | /r/HasProperty | available
Facets:
value: without an internal speaker
type: OTHER
Source sentences:
text: Instrument amplifiers for some instruments are also available without an internal speaker; these amplifiers, called heads, must plug into one or more external speaker cabinets.
text: Instrument amplifiers are available for specific instruments, including the electric guitar, electric bass, electric/electronic keyboards, and acoustic instruments such as the mandolin and banjo.