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The D7 is a three-transducer floorstander in a bass-reflex box. The 7″ mid/bass drive unit uses a newly minted polymer cone, while the 7″ low-frequency drive unit sports a bonded Kevlar composite cone. These drivers feature cast magnesium alloy chassis, high-efficiency motor systems, optimized damping and thermal dissipation, plus a new, highly stable polymer surround that reduces break-in time. Configured as a 2.5-way, the woofer rolls off acoustically around 900Hz while the mid/bass driver extends out to a relatively high 3.2kHz before it hands off to the tweeter.