Acoustic Audio CS-IC42-4PR 150 Watt 4" 2-Way Home Theater In-Wall/Ceiling Speakers (4-Pair) Acoustic Audio CS-ic42 in ceiling speakers, recommended power is 20-150 watts per speaker, frequency response is 55Hz-20 kHz, efficiency is 90dB, 8ohm, 2-way design and functionality 4" woofers, high rigidity polypropylene cones with progressive spiders, butyl rubber surrounds for increased performance, 13mm piezo tweeters, 2-way passive crossovers for greater fidelity Spring loaded speaker wire terminals, paintable grills and frames, cut out is 5.43", overall is 6.73", mounting depth 2.2", 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