Back to business. For those that can only dream of some of the more expensive speakers systems previously listed, KEF's least expensive line, the iQ series, includes five two-channel models starting at $300/pair. (There are also iQ center and surround models.) The top of the line, the iQ9, a floorstander retails for $1200/pair. All Q speakers feature KEF's unusual Uni-Q coincident-driver array: a ¾" aluminum-dome tweeter placed at the center of a midrange cone and a 6.5" titanium-coated polypropylene-cone midrange unit to cover the 280Hz–2.8kHz range and two 6.5" low-frequency drivers, each in its own housing with its own front-loaded port, to minimize crosstalk...