EMINENCE IMPERO15A 15-Inch Professional Series Speakers Ultra-high power handling capacity guarantees long-term durability 4" diameter copper voice coil on fiberglass former Weather-resistant paper cone and dust cap, treated cloth edge Die cast basket is light yet strong, ready to handle rough travel Massive, optimized motor structure helps move serious volumes of air Smooth response up to 2 kHz makes 2-way system designs easy and effective Hand built in the USA Power Handling (RMS) 1200 Watts Power Handling (max) 2,400 Watts Impedance 8 ohms