Blue Octave LW52 In Wall Speakers Home Theater Surround Sound 2-Way Speaker Pair Blue Octave LW52 Linear Series two way home 5.25" in wall speakers, recommended power is 10 to 200 watts per speaker, Efficiency is 94dB, frequency response is 40Hz-25 kHz 5.25" aerated blue IMPP cone woofers with butyl rubber surrounds for longer life, 8ohm impedance, 1" pivoting PEI dome tweeters, spring loaded raw wire connections Paint-able frames and grills, low profile housings designed for easy installation, unique wall locking mounting system, no mounting hardware needed, cut-out templates and full instructions included Cut out size is 6.3" x 9.72" per speaker, overall size is 7.54" x 10.98" per speaker, mounting depth is 3" per speaker, designed and engineered in the USA Use for home theater, surround systems, whole house, multi-room audio systems, covered outdoor areas, commercial, office, retail applications, package contents is 1 pair / 2 in wall speakers