For large rooms, try these Dayton Audio CS620EC 6-1/2″ enclosed ceiling speakers. If you have an attic with blown-in insulation, then these are your ideal ceiling speaker. System includes: one speaker, removable steel mesh grills, built-in mounting brackets, hardware, and installation instructions.
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6-1/2″ black coated poly cone woofer with foam surround and dome tweeter
Gold plated spring loaded speaker terminals
UL94 high temperature rating enclosure
Perfect for attics with blown-in insulation