The compact and efficient EF508 (based on the successful TX4) features a 2" high frequency driver mounted on a wave guide horn and a 4" voice coil proprietary B&C 15" woofer. The carefully chosen crossover point matches the directivity characteristics of the woofer to the horn seamlessly. As the most compact enclosure in it's class, the ultra-high output EF508 is perfect for application in medium to large sized venues, especially when used with an EP508 processor and optional élite subwoofers for extended low frequency support.