High-power subwoofer; Built-in high-output amp; Blue polypropylene cone; Specially treated black rubber edge suspension; 1.5″ aluminum voice coil; Bass reflex vent for added sub-bass response; High-quality carpeted construction; RCA/speaker line input; 8″; 250W max; Dim: 10.4″H x 9.6″W x 20″D;