The SCL-4 is a custom in-wall loudspeaker designed for use as an LCR or surround channel in a variety of applications. It features JBL's patented 2409H 1-inch (25mm) compression driver mated to a High-Definition Imaging (HDI™) horn. A 7-inch (180mm) Advanced Aluminum Matrix cone cast-frame woofer provides detailed and dynamic response with low distortion. The integrated MDF enclosure is designed for installation in standard 2x4 wood frame construction, and Internal connections allow for bi-wiring or bi-amplification in advanced installations. The SCL-4 is ideal for use in medium to large rooms.