A loudspeaker (or speaker driver, or most frequently just speaker) is an electroacoustic transducer, that is, a device that converts an electrical audio signal into a corresponding sound. A speaker system, also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker drivers (above definition), an enclosure, and electrical connections possibly including a crossover network. The speaker driver can be viewed as a linear motor attached to a diaphragm which couples that motor's movement to motion of air, that is, sound. An audio signal, typically from a microphone, recording, or radio broadcast, is amplified electronically to a power level capable of driving that motor in order to reproduce the sound corresponding to the original unamplified electronic signal. This is thus the opposite function to the microphone, and indeed the dynamic speaker driver, by far the most common type, is a linear motor in the same basic configuration as the dynamic microphone which uses such a motor in reverse, as a generator.
![[eBay Plus] Airpods2 Wireless Case $245, Freebuds $88 / Freebuds3 + Wireless Charger $218, AKG NCM2 $189 & More @ Allphones eBay](https://files.ozbargain.com.au/n/55/522855.jpg?h=92a9c86f)
![[Prime] Amazon Echo Dot Gen 3 $39.50 ($0.00 with Coke Offer - EXPIRED) @ Amazon AU](https://files.ozbargain.com.au/n/19/520419.jpg?h=c9f092f8)
![[In Stock] Tannoy Gold 8 - 8-inch Nearfield Studio Monitor (Single) $489 Delivered ($978 for Pair) Also: Gold 7/5 @ Bettermusic](https://files.ozbargain.com.au/n/22/519522.jpg?h=3775c0b8)
