JBL PRX618S-XLF 1x18 1000-Watt Extended Low Frequency Powered Subwoofer (Single) MAX SPL 133db 1000 watt (2 X 500) Crown class D amplifier Tour tough DuraFlex finish for enhanced durability Dual-Bridge Technology, 18" 2268FF dual voice coil Differential Drive woofer provides extended low frequency Only 81.5lbs!