Alto Professional TS18S - 2500W 18-inch Subwoofer, Powered PA Speaker with 6 Selectable DSP Modes, Easy Setup, 137 dB, 3" Voice Coil, Superior Bass
ADAM Audio T10S Studio Subwoofer for recording, mixing and mastering, Studio Quality Sound (Single)
5 CORE 15 Inch Subwoofer Speaker 2000W Peak High Power Handling 250W RMS 15" Replacement 8 Ohm Pro Audio DJ Sub Woofer w CCAW Voice Coil Steel Frame 40oz Magnet FR 15 140 MS