Answer: amplifiers

AnswerCrossword Clue
AMPLIFIERSRock band equipment
AMPLIFIERSLed Zeppelin equipment
amplifiersAn electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction
amplifiersA device of this kind combined with a loudspeaker, used to amplify electric guitars and other musical instruments
amplifiersAMPLIFIER, a device for making sound louder