Passive speakers are readily available on the PA system hire market and are suitable for a wide range of public address applications including conferences, live music, music playback and outdoor event. 
Installation benefits - Passive speaker units are generally smaller and lighter than similarly rated active speakers. As a result they are easier to move and install. They do however require external amplifier units which in some cases can be heavy.Cost - Passive speakers are less expensive to hire as they do not house as much technology in comparison with active loudspeakers. As mentioned though they do require an external amplifier which may incur an additional hire charge. packages though are available.Versatility - A passive system with separate amplifiers can be very versatile if you want to add additional speakers or alter the configuration of the set-up. Identical passive speakers can be daisy chained together assuming the amplifier is suited in terms of power and ohmage. 
Audience size - Is the system powerful enough and has sufficient range to cater for the size of audience and its intended use? Live music events will require a PA system with greater power and frequency range than that required for a conference. PA systems also differ in their ability to project sound accross a venue.
Amplifier & speaker matched - Is the amplifier matched in terms of wattage and ohmage with the speakers it is powering? Insufficiently sized speakers may produce distorted sound and could be damaged if driven past their limit by an overly powerful amplifier.
Professional AV Hire - Your chosen AV hire professional will ensure you have the correct equipment to suit your event requirements. Always inform your AV hire company of all the details of your event to ensure they can recommend the most appropriate equipment.
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Other audio visual hire options that you may wish to consider include:
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