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Sound reinforcement system
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===Monitor loudspeakers=== [[Image:12andbullet.jpg|thumb|A JBL floor monitor speaker cabinet with a {{convert|12|in|cm|abbr=on}} woofer and a "bullet" tweeter. Most monitor cabinets have a metal grille or woven plastic mesh to protect the loudspeaker.]] [[Foldback (sound engineering)|Monitor loudspeakers]], also called ''foldback'' loudspeakers, are speaker cabinets used onstage to help performers to hear their singing or playing. As such, monitor speakers are pointed towards a performer or a section of the stage. They are generally sent a different mix of vocals or instruments than the mix that is sent to the main loudspeaker system. Monitor loudspeaker cabinets are often a wedge shape, directing their output upwards towards the performer when set on the floor of the stage. Simple two-way, dual-driver designs with a [[Dynamic loudspeaker|speaker cone]] and a horn are common, as monitor loudspeakers need to be smaller to save space on the stage. These loudspeakers typically require less power and volume than the main loudspeaker system, as they only need to provide sound for a few people who are in relatively close proximity to the loudspeaker. Some manufacturers have designed loudspeakers for use either as a component of a small PA system or as a monitor loudspeaker. A number of manufacturers produce [[Powered speakers|powered monitor speakers]], which contain an integrated amplifier. Using monitor speakers instead of in-ear monitors typically results in an increase of stage volume, which can lead to more feedback issues and progressive hearing damage for the performers in front of them.<ref name="in-ear tips">{{cite web|url=http://www.audiologyonline.com/articles/article_detail.asp?article_id=2115|title=In-Ear Monitors: Tips of the Trade|access-date=2009-01-24}}</ref> The clarity of the mix for the performer on stage is also typically compromised as they hear more extraneous noise from around them. The use of monitor loudspeakers, active (with an integrated amplifier) or passive, requires more cabling and gear on stage, resulting in a more cluttered stage. These factors, amongst others, have led to the increasing popularity of in-ear monitors.
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