EL-800 is Easy Full Range Line Array Speaker. It Is Composed Of 2 x 8” MF & 1 x 1.5” HF. It Is As Easy To Connect Like A Normal Sound Column. It Does Not Need External DSP To Give Sound Effects As It Has In Built Crossovers To Control The Respective Frequencies. One Set of EL-800 Can Cater Gathering Of Upto 2000 People. One Set Of Easy Line Array Includes 1 x EL - 800 B & 4 x EL - 800. EL - 800 Cannot Be Used Without EL - 800 B Suggested Amplifier MJ - 3000 2Pcs.