JBL CS1204B - JBL 12" Sealed Subwoofer Enclousure, Peak power 1000W, RMS power 250W 12-InchSealed Subwoofer Enclousure, Peak power 1000W, RMS power 250W Compact Sealed Encosure Woofer with Double Magnet 250Watts RMS 1000Watts Peak.