Yorkville's EF500P redefines performance in a high-power professional active loudspeaker enclosure. The woofer or low frequency amplifier uses Class D switching technology to reduce overall weight of the amplifier section. This amp delivers over 650 watts to the 15" woofer. A 150 watt two-tier linear technology class H amplifier drives the 2" titanium diaphragm horn driver. This solution allows the horn to produce loud clean transients to keep up with the high output of the woofer.