BEHRINGER Black (B1800XP) High-performance 3000-Watt powered subwoofer for PA applications World-famous, British engineered 18" TURBOSOUND speaker Extremely high sound pressure level and incredibly accurate bass Precise reproduction of ultra-low frequencies for "bulletproof" punch and impact State-of-the-art 3000-Watt Class-D amplifier with comprehensive over-excursion, thermal, RMS and clip limit protection