Pyramid PMBH215 Studio Pro Dual 15-Inch Professional System Simulated Woodgrain Speakers,Heavy Duty Caster Wheels,Quad Ports for Added Bass Response,Frequency Response: 35-20kHz,Dual 1/4'' Phono Jacks Dual Tone Carpeted Finish 8-Way Speaker System Contains: One 5'' X 15'' Super Horn Midrange/Tweeter,Five Piezo Horn Tweeters, Two 15'' Subwoofers, Kapton Vc 2 Heavy-Duty Handles For Easy Portability