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Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered
speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers
facing the audience and the monitor speakers facing the performers; by DJs performing at dance events and raves; in private homes as part
of hi-fi or home cinema audio systems and as computer speakers. They can be connected directly to a mixing console or other low-level audio
signal source without the need for an external amplifier. Some active speakers designed for sound reinforcement system use have an onboard
mixing console and microphone preamplifier,which enables microphones to be connected directly to the speaker.
Active speakers may have greater fidelity, less intermodulation distortion (IMD), higher dynamic range and greater output sound pressure level
(SPL)with fewer blown drivers.Disadvantages include heavier loudspeaker enclosures, reduced reliability due to active electronic components
within, and the need of a source of electrical power (other than the audio signal). Powered speakers are available with passive or active
crossovers built into them. In the 2000s, active speakers with internal active crossovers are widely seen in sound reinforcement applications
and in studio monitors. Home theater and add- on domestic/automotive subwoofers have used active powered speaker technology since the
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