1.Martin audio,line array speaker,empty box 2.Neodymium 1x8"+1x8"+2x1" 3.for stage performance,gymnasium, ... concert,conference Model: Martin audio,line array speaker,empty box be suitable for large outdoor performance,gymnasium, concert hall,Theatre ... voice coil, front horn loaded, rear reflex loadedDRIVERS: HF SECTION 2 x 1" (25mm) exit HF compression drivers, horn loadedRATED POWERLF+MF ...