audio amplifiers
Volume-increasing electronic devices
Audio amplifiers are electronic devices that increase the power of audio signals, making sound louder.
They take a weak electrical signal—from a microphone, instrument, or playback device—and boost it enough to drive speakers or headphones.
Amplifiers range from tiny circuits in phones to massive units powering concert venues: The band's audio amplifiers filled the stadium with sound.
- gain controlAcquire command of
- volume knobRotary sound level control
- vacuum tubeEvacuated electronic amplifier
- transistorSemiconductor signal switch
- solid stateUsing semiconductors, not tubes
feedback loop · power · public address system · distortion · heatsink · slew rate · capacitor · signal-to-noise ratio · transformer · biasing · guitar amp · hi-fi stereo · hum · dynamic range · preamplifier · efficiency rating · clipping · tube amp
audio amplifiersattenuators
Devices that diminish intensity
limiters · pads · compressors