Kef REF8B Twin 9" Driver 'Force-Cancelling' Subwoofer Black , Each

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Kef REF8B Twin 9" Driver 'Force-Cancelling' Subwoofer Black , Each Product Details Twin 9 inches driver 'force-cancelling' subwoofer Delivering exceptional bass precision and contr ol with zero distortion, Reference 8b is a truly extraordinary subwoofer. REFERENCE 8b For power with accuracy the Reference 8b sub has two 500W Class D amplifiers, each driving a 228mm (9 inch) long-throw, ultra-low distortion driver. These are connected back-to-back in a heavily braced, acoustically inert cabinet. The result is low distortion bass with effortless body and weight. Show more