英和和英

a loudspeaker

a device that muffles sound, called silencer

an acoustic device

an audio apparatus called power amplifier

the vocal organs

a record for a gramophone

sound equipment called an equaliser amplifier

mnemonic device

a megaphone

a device

an audio-instrument called a main amplifier

a gramophone

analogue device

an apparatus for absorbing vibration

an attachment of an apparatus

a machine for collecting low volume sounds and amplifying them, called parabolic reflector

an electromagnetic {receiving instrument} called sounder

stereo equipment that boosts the sound level called an integrated amplifier

an explosive device

an amplification instrument called a {class B amplification circuit}

a device for making soundings

a sound instrument called control amplifier

homing devices

calibrate an instrument

a sound instrument called an audio amplifier

a speaker unit for gamut

an exclamatory rhetorical device

a subtle device

an installed apparatus

stereo equipment that combines the main and pre-amplifiers