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KEF Reference 107 tower speakers
KEF Reference 107 towers, Sonic Impressions from Stereophile’s review:
“Whereas most dynamic speakers struggle to integrate their driver outputs into a semicoherent blend in the far field, the 107 is seamless. What struck me immediately about the 107s, when I heard them first under show conditions, was their wonderfully cohesive and effortless sound. That impression has not diminished in the comfort of my own home. The transition from the bass to the mids is magically integrated, and the conviction with which I perceive instrumental space and focus across the soundstage is heightened considerably.
Music emerges from the 107 like ripples in a clear mountain lake. There is no sense of strain or stress, even on very loud passages. The vocal-range magic of the Spendor BC1 and SP1 is present here in full force. Voice is reproduced very naturally, without any coloration. Neither are instrumental timbres slighted in any way, and harmonic accuracy is preserved up and down the audio bandwidth. String fundamentals and overtones are convincingly reproduced, and woodwinds possess excellent clarity and detail, while brass has its proper bite, without gratuitous brightness or harshness. With the right electronics, musical textures are fleshed out with a convincing mixture of soft and hard, sweet and brash.
This is not a hi-fi-ish sort of speaker; it doesn’t overdo the music with impressive special effects or extraneous boom and sizzle. It is very enjoyable, always listenable, and soundstage imaging is excellent, with width and depth perspectives as good as anything I’ve had in the house. The illusion of a continuous soundstage independent of the speakers is very strong with the 107. Instrumental focus within this stage is very good…
There are two other prize-winning aspects to the 107. First, the bass. The quality and quantity of the bass octaves are exceptional—the best I’ve heard from a conventional full-range system. Bass power, impact, and clarity leave one breathless on orchestral spectaculars. Second, headroom is sufficient to duplicate, at a typical listening position (even in a large room), the full dynamic range of any orchestral work—even a Respighi. The 107 gracefully complies with the dynamic demands of the music—it’s capable of blooming from soft to very loud without a trace of compression or distortion. For example, it is hard to think of choral music with more electrifying intensity and grandeur than Sir William Walton’s Belshazzar’s Feast (EMI SAN324). Andre Previn is able to get the most out of the London Symphony Orchestra, and the English baritone John Shirley-Quirk is particularly effective in the haunting “King’s Feast” movement. This work demands a full-range system with excellent dynamics, and the 107 is equal to the task, handling the full orchestra and chorus with aplomb…
Overall, I consider the KEF 107s to be an engineering marvel and, by a clear margin, the best full-range conventional speaker money can buy. This is a smart speaker (two brains, remember), so it’s not surprising that—in my opinion—it blows away all other conventional speakers in our Class B recommendations. They are that good! I have enjoyed the 107 over the past several weeks, and urge you to audition them promptly at your nearest KEF dealer.”
Description: Three-way, floor-standing loudspeaker with Conjugate Load Matching, Coupled-Cavity bass loading. Drive-units: 1″ (25mm) metal-dome tweeter, 5″ polypropylene-cone midrange unit, two 10″ (250mm) pulp-cone woofers. Crossover frequencies: 160Hz, 2.5kHz. Frequency response: 20Hz-20kHz ±2.5dB (-6dB at 18Hz, Q=0.5). Directional axis characteristics: within 2dB of reference up to 10kHz for ±10 degrees vertically, ±30 degrees horizontally. Position of reference axis: 40″ above cabinet base, not including feet. Nominal impedance: 4 ohms resistive. Sensitivity: 90dB/W/m (2.83V band-limited pink noise, 50Hz-20kHz, anechoic). Amplifier requirements: 50-300W. Maximum output: 112dB spl on program peaks under typical listening conditions.
Dimensions: 45.9″ (1165mm) H by 13″ (330mm) W by 17.6″ (448mm) D (speaker). Enclosure volume: 72 liters (LF), 8.5 liters (midrange/HF). Weight: 99 lbs (45kg) each (speaker).