DAYTON TITANIC MK III SUBWOOFER - 4 OHM - 15" The best just got better! Our main goal was to create subwoofers that produce deep clean bass, have high power handling capabilities and long term reliability. The new Titanic MKIII Subwoofers exceeded all of our expectations. These drivers will work well in both vented and sealed enclosures, and with their unique VCSTM cooling system, copper shorting ring, and 2-1/2" diameter voice coils, they can handle even more power to produce higher output levels with less distortion! We've used the finest materials available to ensure that each driver is built to the highest quality standards for long-term trouble-free performance even under extreme sound pressure levels!