All speaker systems will require some form of audio amplifier, be it a small battery powered bluetooth speaker, or a large commercial multi zone installation. There are two main types of audio amplifier, 100v line and low impedance.
100v Line Amplifier
These amplifiers are used mainly for installation audio systems where large quantities of speakers are required. Usually run from a single mono channel, these amplifiers can be used where large cable runs are needed. Used in conjunction with a matrix mixer, large commercial multi zone systems can be created.
Low Impedance Amplifiers
Generally used for two channel stereo systems for live PA rigs, nightclubs, DJ’s, and home audio systems, various power and channel options available.