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2-Way Walnut Q Series Rear Surround Speakers

To really feel like you're in the middle of the action, with machine guns rat-tatting in front and behind you, or perhaps with dinosaurs catching up, then quickly surpassing you as you run full speed for the safety of the building, you need a pair of the KEF iQ8ds rear surrounds. Part of the iQ series offered by KEF, it utilizes the innovative Uni-Q array technology to put you square in the center of the fray. Get the most out of your surround with a dipolar iQ8ds pair.

Making The Back Sound As Good As The Front

As the dipole rear effects speaker for the Q Series, the two 5.25" Uni-Q arrays in the heavily braced curved cabinets of the iQ8ds disperse atmospheric effects encoded in digital soundtracks evenly throughout the listening area to create a sense of place so real, you can almost touch it. Perfectly timbre-matched to the rest of the range, transitions are seamless and the detailing impeccable. A simple keyhole mounting system allows effortlessly quick wall installation. Sit back and enjoy.

What You Can Expect From KEF

Your satisfaction is a foregone conclusion with the KEF iQ8ds dipole rear surround speakers. You'll be blown away--or at least buffetted by the strong winds you'll hear from behind you while listening to movies like Twister. Combining the latest 5.25" Uni-Q mid/HF array with dipole technology, you're on the business end of serious background effects, and with KEF's massive internal bracing, none of the LF distortions that can affect speakers. The dipole setup (signals firing out of phase), plus twin, balanced Faraday loops above and below the coil, ensure perfect symmetry of the flux profile, constant coil inductance with position, and greatly reduced flux modulation. The top Faraday loop also assists in heat dissipation from the motor system. The open chassis design and vented cones minimize trapped air noise. A prodigious acoustic performer with the power to keep you on the edge of your seat, the iQ8ds is an investment in pure pleasure.

Acoustic Intelligence

Acoustic intelligence--that's the best way to describe what KEF engineers have applied to create their newest line of iQ rear surround speakers. From the second you spot the soft sheen of titanium on the Uni-Q Array driver cones, you know you're in for something special. And you won't be disappointed. Restless, despite being one of the best, KEF has made improvements to every aspect of its trademark Uni-Q technology. With new cone materials and surrounds. Redesigned magnet structures. New, state-of-the-art voice coils. Higher specification components. More rigid chassis and cabinets. The result of all these innovations is plain to hear. Power handling and sensitivity are better than ever. iQ plays loud and true, with even clearer vocals than its illustrious predecessor. Even gutsier and more tightly controlled bass. And, of course, the impeccable extended bandwidth response you need to get the most out of the latest digital audio and home theatre formats. As every model in the range is voiced for a perfect tonal match, the 3-D soundscape is so seamlessly integrated that everyone in the room gets the full benefit, wherever they sit. Breathtaking is the only word to describe it.

Uni-Q Array Explained . . .

KEF's iQ series incorporates Uni-Q technology, something originally designed for one of the world's finest speaker models, KEF's legendary Reference Series. With each generation of speakers, KEF expands on and improves their Uni-Q offerings. The Uni-Q concept is based on using aerospace materials to make the tweeter small enough to place at the acoustic center of the bass/midrange cone. With both drive units on exactly the same axis and sharing the same waveguide, they behave as a single point source that projects a more natural sound image over a much larger area than the usual tiny sweet spot.

And Explained . . .

The Uni-Q configuration eliminates the inherent problems of having the separate midrange and high frequency drive units of a conventional speaker. As loudspeaker radiation varies according to frequency, low frequency and high frequency drivers have intrinsically different radiation patterns whose directivity, known as Q, changes at the crossover frequency. Interference, or lobing, between the two units causes a dip in power response around this frequency, with a peak above it due to their differences in directivity. These factors introduce colorations that muddy the sound image. You get no such problems with Uni-Q. Being coincident and perfectly time-aligned, the directivity of both LF and HF units is controlled by the profile of the midrange cone, with no possible path or phase differences between the two, and no lobing interference at the crossover. In other words, the Q is unified--hence the name Uni-Q. So instead of narrowing toward the crossover and then widening again as is the case with separate drive units, the Uni-Q radiation pattern remains stable. Power response is uniform, with smoother variations on- and off-axis. The acoustic image is better balanced and more natural sounding across both direct and reverberant fields. Multichannel imaging is noticeably clearer and more accurate.

. . . And Interpreted

No matter where you put the speakers, and no matter where you sit, you'll get the same rich sound. No more bolting everything in place to make sure you're located at the optimal listening spot. All the notes, tones, pitches, and sounds the speakers have to offer travel in a group so you hear them all evenly, everywhere. It's almost enough to make a person tear up.

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