BIC Acoustech PL-66 Surround Speakers (Pair) You Will Receive : Two-way three component bookshelf/surround speakers. Flush wall mounts Drivers: One 6 1/2"" high efficiency aluminum horn tweeter w/neodynium magnet, one 6 1/2"" poly-injected woofer with butyl rubber surround, one 5"" x 7"" passive radiator for extended bass output. Recommended Power: 10-175 watts per channel. Dimensions: 10""H x 14""W x 7 1/4""D