Acoustic Audio 251W Indoor Outdoor 3 Way Speakers 1600 Watt White 4 Pair Pack 251W-4Pr Acoustic Audio 251W indoor or outdoor white weather resistant speakers, recommended power is 20-400 watts per pair, frequency response is 37Hz-20 kHz, efficiency is 99dB, 8ohm 3-way design and functionality, 4" silver poly dynamic woofers with butyl rubber surrounds, 2" mylar dome midranges, .5" mylar dome tweeters, weather resistant design Quick release spring loaded wire terminals, mounting brackets and hardware included, heavy duty ABS sealed cabinets, each speaker size (HxWxD) is 7.375"x4.625"x4.125", designed in the USA Full instructions included, use for surround sound, home theater, multiple room systems, industrial sound, bookshelf, bathrooms, kitchens, car audio, marine audio, pools, spas, yards, decks This listing and price is for 4 pair / 8 indoor or outdoor speakers