Heavy Duty Construction w/Reinforced Corners - Dual Tone Carpeted Finish - Dual 1/4"" Phono Jacks - Frequency Response: 35-20kHz * 7 Way Speaker System - Heavy Duty Caster Wheels - SPL: 107dB @ 1W/1M * Each PMBH18 Contains: One 5"" x 15"" Super Horn Midrange/Tweeter Five Piezo Horn Tweeters One 18"" Subwoofer, Kapton VC, Made in USA - Quad Ports for Added Bass Response - Impedance: 8 Ohms * Two Heavy Duty Handles for Easy Portability - Built in Crossover Network - Dimensions: 24""W x 15""D x 32""H * Quick Connect Speaker Terminals - Power Handling: 325 Watts RMS/650 Watts Peak