With an included back box enclosure, the CSI/SPECO In-wall Enclosed Speaker Series is an excellent choice for applications where extra protection and consistent sound quality are a concern. This two-way speaker series features titanium swivel dome tweeters, blue fiberglass cone woofers, high level frequency response, ample wattage, and excellent sensitivity ratings, making the series ideal for a variety of commercial applications. The model is also available in 5 1/2" (SP-525BB) and 6 1/2" (SP-625BB) woofer sizes.