KEF Model 103/3
¥ 300,000 (a set of two cars, around 1988)
¥ 260,000 (a set of two cars, around 1989)
Commentary
This is an upgraded speaker system based on the Model103/2.
KEF's own active low-frequency equalizer, KUBE, is included.
KUBE provides two types of equalization : a fixed type that automatically adjusts the mid - and high-frequency ranges to flatten out at maximum efficiency, and a variable type that allows the user to move the dial to obtain the optimum low-frequency range for room conditions and program sources.
CC (The Coupuled Cavity) system using 20 cm cone type woofer is adopted for the low range.
In this system, the woofer unit is mounted inside the enclosure and the enclosure is divided. This eliminates the cancellation phenomenon that occurs when the unit and the duct are in opposite phases below the resonance frequency, which is a problem with the bass reflex system. This realizes both the high efficiency of the bass reflex system and the good transient characteristics of the sealed system.
A 16 cm cone type skoker using polypropylene cone is mounted in the middle area.
The T33, a 2.5 cm soft dome type tweeter, is installed in the high range.
A unique CLM (Conjugate Load Matching) is adopted in the network part.
In CLM, irregular and complicated speaker impedance is changed to almost flat resistance value over all audible frequencies by the action of the conjugate network developed by KEF.
As a result, the sensitivity and maximum output level are almost twice as high as those of ordinary speakers under the same amplifier operating conditions. Moreover, the dynamic range is expanded, enabling ideal matching with the amplifier.
There are 2 variations, natural walnut and natural rosewood finish.
The Model103/3 had a special stand as an option sold separately.
The stand was made of highly compressed メダイト material and it was recommended to fill the cavity with sand or lead particles.
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Model Rating
| Method | 3-Way / 3-Speaker / CC System / Bookshelf Type |
| Units Used | For low band : 20 cm cone type For Medium Range : 16 cm cone type For High Range : 2.5 cm Dome Type (T33) |
| Frequency characteristic | 50 Hz to 20 kHz ± 2 dB |
| Impedance | 4 Ω |
| Output sound pressure level | 92dB/2.83V/1m |
| Crossover frequency | 150 Hz, 3 kHz |
| External dimensions | Width 265x Height 575x Depth 317 mm |
| Weight | 17kg |
| Attachment | Active equalizer KUBE |
| Sold Separately | Dedicated Speaker Stand KS103/3 (2 pcs 1 set, ¥ 35,000) |