![]() ![]() ![]() I don't find the Q150 tweeters to be harsh yet they are revealing and can point out weaknesses in up-stream electronics as well as in recordings. While the Q150's are tolerant of lesser quality amplifiers, they do benefit from higher quality amplification: I could readily identify differences between power amplifiers, prompting me to settle on one in particular. However over time (after break-in) I preferred listening without the foam inserts. Initially in my room, I preferred listening with the supplied foam cylinders inserted in the rear ports. While I haven't yet taken any measurements, frequency response sounds acceptably linear, and amplifier load seems to be an easy one making for an easy match with most any decent amplifier (or receiver, if you're so inclined). Right from the start, the Q150's impressed with wonderful detail minus obvious stand-out sonic aberrations, stable imaging, and neutrality. So are room placement considerations with some experimentation. So how does it sound? Just like most all loudspeakers, break-in time is required. (It is here at this price point certain material/construction compromises needed to be made this is understandable.) All are integral parts, yet from experience the final implementation still requires much testing, listening, refinement to arrive at an exceptional loudspeaker. Of course an accurately-designed enclosure is part of the equation. The Q150 sets a new standard using a specially-designed 'coaxial' (UniQ) driver with state-of-the-art cone material and finely-integrated well-designed tweeter as well a precision crossover utilizing quality components. KEF also developed several well-reviewed milestone loudspeaker systems. The famous BBC LS3/5a monitor employed KEF drivers as did other audiophile-grade loudspeakers of that era by IMF, Fried, JR, etc. Years (OK, decades) ago I employed KEF drivers such as the B110, T27, and B139 in some of my loudspeaker designs. ![]() With the addition of the damped tweeter loading tube providing a gentle termination of sound produced from the back of the tweeter, lower treble performance is improved dramatically and a new low-distortion inductor on the crossover provides cleaner bass.įeaturing a Computational Fluid Dynamics (CFD) port design with the port repositioned to the rear of the speaker, clarity is improved by reducing the audibility of the midrange leakage through the port.As a long-time audiophile, audio engineer, and having previously designed several loudspeaker systems, I appreciate what KEF has achieved in this small package at this price point. To optimise the high-resolution purity of the Q Series bookshelf speakers, the Uni-Q driver is repositioned to the centre of the cabinet to reduce unwanted internal resonance and adding refinement to sonic clarity and detail. Uni-Q’s ultra-wide dispersion is further enhanced through KEF’s ‘tangerine’ waveguide over the tweeter dome. 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. The signature innovation places the tweeter in the acoustic centre of the midrange and bass cone, bringing the acoustic idea of a single point source closer than ever to realisation. Featuring the signature KEF Uni-Q driver array with Computational Fluid Dynamics (CFD) port design, the Q350s deliver detailed natural sound with high clarity and tight bass.Īt the heart of the evolved Q Series is the Uni-Q driver array. The remarkable Q Series bookshelf speakers excel when space is limited. Uni-Q array: 1x 6.5″ Uni-Q, 1x 1″ HF drivers. ![]()
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