Acoustic Audio AA40CB Indoor 3 Way Speakers 2000 Watts Black Bookshelf 2 Pair Pack AA40CB-2PR Acoustic Audio AA40CB indoor black full range speakers, recommended power is 20-500 watts per speaker, frequency response is 94Hz-20 kHz, efficiency is 94dB, 8ohm Two 4" polypropylene full range woofers per speaker, 1" soft dome tweeters, quick release spring loaded wire terminals Heavy duty ABS construction sealed cabinet, speaker size (H x W x D) is 5.75" x 15.625" x 5.75", designed and engineered in the USA, full instructions included Use for surround sound, home theater, multiple room systems, center channel speaker, industrial sound systems, bookshelf, bathrooms, kitchens, car audio This listing and price is for 2 pair / 4 indoor speakers