The ES18P is a modern-day update of Yorkville's flagship 'giant killer', the LS801P. The cabinet dimensions have been altered to offer better mobility, but the punch is still there. They've also added a little-brother to the family, by scaling down the 18" subwoofer design into a 15" platform. The ES15P design dials up the watts and incorporates a custom engineered 15" woofer to produce an astonishing amount of low end output in a 15" subwoofer.