The 15-X-SS is our high-output 15" two-way enclosure. The 15-X-SS uses a neodymium woofer with a 4" voice coil and a 1.5" compression driver on a 60º x 50º Tractix wave guide. It is suitable for high output use in club, sound reinforcement or houses of worship. While it has greater output than our 15-2-SS it is still recommended to be used with a suitable subwoofer such as our TL 18.1 for low-frequency-heavy applications. The 15-X-SS is rugged and ready for most of your demanding full-range needs.