Amazon.com: PRV AUDIO 10 Inch Woofer Speaker 10W650A, 650 Watts Program Power, 8 Ohm, 2.5 Inc Voice Coil, 325 Watts RMS Pro Audio Speaker Loudspeaker (Single) : Electronics
SKP PRO AUDIO TITANX-18600 18" WOOFERS LOW SOUND, Program Power 1200W, Nominal Impedance 8 Ohm, Professional Subwoofers and Deep Bass and Mid-bass - Walmart.com