KEF Model 104/2

Commentary

A reference series speaker system using KEF's original CC system.

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.
The combination with KUBE realizes low-frequency reproduction extending to 20 Hz or less.

The Coupuled Cavity (CC) system using two 16.5 cm cone type woofers 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.
In addition, the unique twin arrangement of the woofer cancels the distortion caused by each woofer, which cannot be avoided with a single woofer, eliminates unnecessary vibration, and controls around 90 hz where the musical power is concentrated.

Two 12.5 cm cone type skokers are mounted in the middle area.

A 2.5 cm dome type tweeter is installed in the high range.

The vertical twin layout with two skorkers and one tweeter between them is adopted for the middle and high range, and sound image localization is improved.

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.

Model Rating

Method	3-way, 5-Speaker, CC System, Floor Type
Units Used	For low band : 16.5 cm cone x2 For Medium Range : 12.5 cm Cone Type x2 For high-pass : 2.5 cm dome type
Frequency characteristic	35 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 280x Height 900x Depth 415 mm
Weight	32kg
Attachment	Active equalizer KUBE