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Message: <blockquote data-quote="audioholic" data-source="post: 5029077" data-attributes="member: 549629">For a couple basic reasons. One is to isolate the front and rear sound waves emitted from the speaker so as to avoid cancellation. Second is that most speakers are designed to rely on the enclosure's 'air cushion' as part of its suspension system, to keep the cone under control. A third less fundamental reason is as a tool to use the rear waves to reinforce the front waves, thereby increasing efficiency (vented systems).Some would argue a speaker does not always require an enclosure, such as infinite baffle or sealed-back speakers. The IB situation still requires a baffle to isolate front/rear waves, and a sealed-back speaker simply uses the frame to do the same.</blockquote>

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