SPEAKER Mini YDT37 Speaker 4Watt 4 Ohm 90x30mm Thickness 12mm Speaker Audio Speaker 4W For Home Theater Stereo Amplifier Speakers

Speakers are transducers that convert electromagnetic waves into sound waves. The speakers receive audio input from a device such as a computer or an audio receiver. This input may be either in analog or digital form. Analog speakers simply amplify the analog electromagnetic waves into sound waves. Since sound waves are produced in analog form, digital speakers must first convert the digital input to an analog signal, then generate the sound waves.