KEF Reference Model2

Commentary

A toll-boy type speaker system that employs a UNI-Q driver and TCC system.

A unique interport bus system, the Twin Coupled Cavity (TCC) system, is used for the low frequency band.
In The Reference Model2, two 16 cm pulp cone type woofer B160 are mounted back-to-back inside the cabinet. By absorbing and emitting both units, the same sound pressure as a normal unit with twice the vibration width is obtained. Each unit is grounded in a box-shaped cavity located in the upper and lower part of the cabinet, and the frequency is tuned by a hole (interport) in this cavity. These internal mechanisms enable extremely high-speed and thick low-frequency reproduction. In addition, the low-frequency phase is matched by the air diaphragm laid out on the same plane as the mid-range and high-range units.
To prevent interference and sound energy cancellation between the two woofer units, a 50 mm diameter force canceling rod made of hard aluminum joins the two woofer magnet sections to prevent delayed resonance, which adversely affects sound quality.

16 cmUNI Q driver, KEF's unique coaxial type unit, is installed in the middle and high frequency ranges.
This unit uses MB160 for the cone woofer and NT25 for the soft dome tweeter. In addition to the coaxial structure, the diaphragm is positioned at the same point in the depth direction so that the center of the sound is completely overlapped. This realizes a single sound source that matches in all points of time, space, and directivity. In order to realize this structure, the Tweeter NT25 uses neodymium iron boron, which has 10 times the magnetic force of ferrite, and succeeded in miniaturization of the magnetic circuit.
In the new reference series, pure silk is used for the tweeter diaphragm to improve sound connection.

The network section is designed based on an original computer data analysis.
In addition, oxygen-free copper wire is used for the wiring material to enable high-purity transmission.

The UNI-Q driver is laid out at the top to prevent the influence of the baffle surface from interfering with the expansion of the sound field. This reduces distortion and improves sound spread, sound field sensation and phase characteristics.
In addition, in order to reduce the influence of mutual interference between units and unnecessary vibration from the outside, a new material HDSP (High Density Structural Polymer) is used for the baffle surface, which is excellent in vibration control and has very dead acoustic characteristics. Moreover, for this material, each unit is semi-floating processed with vibration absorbing rubber material between them, and the screw stopper is decoupled structure with vibration absorbing material to eliminate the influence of cabinet vibration.
In addition, considering the effect of the edge of the speaker on sound, the whole is finished in a streamlined ergo design.

The bottom of the cabinet uses the same HDSP as the material used to fix the speaker unit, so as to stabilize the whole system and eliminate interference to sound caused by external vibration.
The exterior features a Rosetta Bar Finish featuring Italian-style wood grain.

The rear terminal is made of strong brass cast into a mold and gold-plated.
You can also use a banana plug for bi-wiring and bi-amplifier.

The legs are equipped with a gold-plated brass insulator.
In addition, the core of the legs can be inverted to form spikes, and the length can be adjusted according to the condition of the floor surface.

The left and right characteristics are strictly controlled and tuned from the stage of the unit, and the error is kept within ± 0.5 db.
In addition, each speaker is managed and manufactured by a single skilled worker from the selection of materials, processing, assembly, soldering, wiring, and product inspection. All the work is done manually to achieve high quality.

Model Rating

Method	3-way, 3-Speaker, TCC System, Tall Boy Type, Anti-magnetic Design
Units Used	For low band : 16 cm cone type (B160) x2 For Mid and High Band : 16 cm Coaxial Type (16 cm Cone (MB160) + 2.5 cm Dome (NT25))
Frequency characteristic	45 Hz to 20 kHz ± 3 db 39Hz -6dB
Impedance	4 Ω
Output sound pressure level	90dB/2.83V/1m
Maximum output level	113dB
Crossover frequency	150 Hz, 3 kHz
External dimensions	Width 230x Height 1,014x Depth 372 mm
Weight	25kg
Attachment	Spike