Features dual low frequency 15" drivers, 2.5" diameter edgewound ribbon voice coil, Ferro-fluid cooled compression driver with titanium diaphragm, advanced network topology crossover, quasi 3-way design, 500W (continuous), 2000W (peak), Progressive Transition high frequency waveguide, one Neutrik® Speakon NL-4 input, one .25" TS phone jack, rugged .75" MDF enclosure, SonicGuard driver protection, and 18-gauge perfortated steel grill, 43.3"H x 18.3"W x 17"D, black.