New 1,000-Watt KEF Subwoofer Said to Reduce Cabinet Size by a Third

KEF launched the $1,499 KC62 subwoofer Thursday with updated Uni-Core technology that enables a smaller cabinet size without affecting output. Uni-Core’s force cancellation configuration and single-motor system, with concentrically arranged voice coils, allows the cabinet size to be reduced by a third from previous designs while equaling or exceeding the driver excursion of a much larger subwoofer, said the company. The 31-pound sub measures 9.7-by-10-by-9.8 inches. Uni-Core “allows us to pack two drivers into a tighter space without compromising their performance," said Jack Oclee-Brown, KEF head-research & development. Each driver is powered by a 500-watt class D amplifier. The subwoofer's Smart Distortion Control technology is a sensorless motional feedback system designed to correct signal anomalies and transients for accurate bass with less colorization and distortion. Digital signal processing algorithms, designed in-house, continually analyze the signal to prevent clipping, it said. A new P-Flex surround in the sub resists acoustic pressure inside the cabinet without limiting sensitivity, KEF said, comparing the surround's design to origami paper folding.