Acoustic Audio CS-ic83 in ceiling speakers, recommended power is 20-350 watts per speaker, frequency response is 40Hz-20 kHz, efficiency is 95dB, 8ohm, 3-way design and functionality 8" woofers, high rigidity polypropylene cones with progressive spiders, butyl rubber surrounds, poly mica midranges, 13mm soft dome tweeters, 3-way passive crossovers for greater fidelity Spring loaded speaker wire terminals, paintable grills and frames, cut out is 9.45", overall is 10.83", mounting depth 3.78", designed and engineered in the USA, full instructions included Use for in wall or in ceiling home entertainment, center channel, home theater, multiple room systems, industrial sound, outdoor entertainment areas, decks, patios, pools This listing and price is for 4 pair / 8 in ceiling speakers