Acoustic Audio HD-6c In-Wall 6.5" Center Channel Speaker In Ceiling 350 Watt Acoustic Audio HD-6c High Definition in wall speaker, recommended power is 20-350 watts, frequency response is 33Hz-22 kHz, efficiency is 98dB, crossover frequency is 2200Hz, 8ohm 3-way design and functionality, two 6.5" woofers, woven fiber bulletproof cone with butyl rubber surround, 12mm soft dome tweeter, spring loaded speaker wire terminals All weather design for indoor and outdoor use, paintable frame and grill, low profile housing, integrated wall-lock mounting system, cut-out template included for easy installation Cut out size is 19.25" x 7.5", overall size is 20.5" x 8.75", mounting depth is 3.25", designed and engineered in the USA, full instructions included Use for home theater, surround systems, whole house, multi-room audio systems, covered outdoor areas, commercial, office, retail applications, package contents is 1 in wall center speaker