Maximum modal suppression phase plug. Deepdrawn titanium diaphragm with polyimide surround. Sound Castle soft clamping diaphragm assembly. Ideal for PA systems, stage monitors, and high-end audio applications, ensures exceptional performance in any setting. Superior HighFrequency Accuracy Provides crisp, clear highs essential for professional audio clarity. Rugged and Reliable Constructed to meet the rigorous demands of touring and continuous use. Specifications. Impedance 16 OHM. Size 1.4. Weight 6 lbs