Given its sizing, the Q650c pairs best with the Q950, Q750, and Q350. With a 110 dB maximum output, this 8Ω speaker (4.2Ω minimum) weighs 30 lbs (13.6kg), features a 55Hz - 28kHz frequency response, and measures 8.26" tall by 24.76" wide by 11.96" deep (the height jumps up to 8.42" with the included rubber feet). Similar to the Q750, the Q650c Center Channel boasts a 6.5" (165mm) Uni-Q driver array and 6.5" LF driver, but only one 6.5" Auxiliary Bass Radiator. Q650c Center Channel Speaker ($649.99 each). But this 8Ω (3.2Ω minimum) speaker has a max output of 110db, weighs 32 lbs (14.5kg), and measures 34.37 inches" tall by 7.08" wide by 10.94" deep (plus a little extra if you bolt on the included plinths). Frequency response takes a hit on the low end, naturally, with a range of 45Hz-28kHz. Similarly, the Q550 boasts a similar configuration as its bigger brothers, but this time it's a 5.25" (130mm) Uni-Q driver array, 5.25" LF driver, and twin 5.25" Auxiliary Bass Radiators. Q550 Floorstanding Speaker ($549.99 each). This 8Ω (3.2Ω minimum) speaker features a 42Hz-28kHz frequency response and maximum 111dB output, weighs 36.4 lbs (16.5kg), and measures 36.33" tall by 8.26" wide by 12.04" deep (plus a little extra if you bolt on the included plinths). The Q750 is set up much like the Q950, but with a smaller 6.5" (165mm) Uni-Q driver array, 6.5" LF driver, and dual 6.5" Auxiliary Bass Radiators. Q750 Floorstanding Speaker ($749.99 each). With a frequency response range of 38Hz-28kHz, this 8Ω (3.2Ω minimum) speaker has a 113db maximum output, weights 45.4 lbs (20.6kg) and measures 41.81" tall by 9.6" wide by 12.91" deep plus a little extra when you bolt on the included plinths. The KEF Q Series flagship boasts one 8" (200mm) Uni-Q driver array, one 8" LF driver, and DUAL 8" Auxiliary Bass Radiators. Q950 Floorstanding Speaker ($899.99 each). Let's take a minute to break down the key specs of each model (you can also click on each model name to purchase on ): You can read our KUBE 12b review HERE, but the short version is this: the 12b sounds a lot like KEF's powerful $1700 R400b, but costs $1000 less and offers KILLER performance for small and medium-sized rooms. Fortunately, KEF has also released a new KUBE Subwoofer series that works wonders with these 2017 Q Series speakers. Previous Q generations included dipoles and subwoofers too, but dipoles aren't great for Atmos/DTS:X precision, and the 2011-era Q400b was a lackluster sub. The 2017 Q Series contains three floorstanding speakers, one (new) center channel, two bookshelf speakers, and one Dolby Atmos-enabled module. It's a demonstrable leap forward in sonics and performance, and sending these back to KEF will be a day of great sadness. My old iQs are fine, and the 2011 Q Series was quite good (review HERE), but the 2017s are almost as good as KEF's incredible and pricey R Series (review HERE). The 2017 KEF Q Series is the series' eighth incarnation, and it shows. KEF says, "the result is a more detailed, accurate three-dimensional sound image, which is dispersed more evenly throughout the room than is possible with any conventional speaker." KEF also likes to round out its floorstanding speakers with one or more Auxiliary Bass Radiators (ABRs), which are passive bass drivers that feed off the towers' low-frequency driver(s). The heart of every KEF speaker is what they call the "Uni-Q Driver Array." Rather than install a high-frequency tweeter and midrange driver in different locations, KEF places the tweeter at the acoustic center OF the midrange driver and bass cone. Ten years ago, she turned to me during an iQ9 demo (this is two Q generations ago) and said, "oh my God, it's like I can almost hear again." And now they're even better. I've personally owned or reviewed the last three Q generations, and when I speak of this series, I like to tell people about my wife, who is partially deaf in one ear. A best-seller since 1991, the KEF Q Series is a speaker line that, while not quite entry-level cheap, serves as a stepping stone to Hi-Fi goodness without paying Hi-Fi surcharges.
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