Self-powered speakers

Self-powered speakers

Description

Self-powered speakers are best exemplified by the stereo speakers that accompany your desktop computer. They require no external amplifier, as the amplifier is built into the speaker cabinet. Consumer grade self-powered speakers can sometimes be sufficient for an extremely intimate exhibition space, but for most exhibition environments they do not provide an adequate spectrum of sound nor sufficient volume. Professional quality self-powered speakers exist, but in certain circumstances, use of self-powered speakers in installation environments leads to "ground hum" - an audible 60 hertz hum or visible light rolling bars in the video image. This can occur when speakers are plugged into a different AC circuit than the video equipment, as is sometimes required in large presentation spaces. Also, the cables connecting the playback device to the self-powered speakers are prone to noise and interference when run over long distances.