What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

KEF K 140

The K 140 (1991-1993) was a direct descendent of the Coda II, III, IV which was a hugely successful loudspeaker both in the UK and abroad. A two-way system for use on a bookshelf or on stands, the K140 used a 200mm (8-inch) bass driver to provide good bass performance and high output capability but was compact enough to fit neatly into a wide range of listening rooms.

KEF have an enviable track record when it comes to designing classic 200 mm (8-inch) two-way systems. The K 140 is no exception. Easily accommodated, and with no special installation problems, the K 140 has a prodigious that is, for such a compact speaker.
An 18 mm (0,75-inch) thickenclosure ensures low levels of cabinet colouration, and fast, detailed bass performance, with good weight and extension, when correctly positioned. This may be on a stand around 450 mm (18-inch) high, free-standing, or with some wall reinforcement. The 89 dB/2,83V/1m sensitivity ensures high output from moderately-powered amplifiers. The use of kapton for the bass unit's voice-coil former gives high efficiency with low distortion, thanks to its freedom from magnetic effectc and eddy current losses. Being thermally inert, it is well able to withstand the high temperatures generated during high-level replay. Careful equalisation using computer optimisation together with attracyive appearance, make the K 140 the system of choice for a thoroughly musical and outstanding all-round performance.

Specification: K140
System Type:  Two-way, shelf/stand-mount
Enclosure Type:  Closed box
Nominal Impedance:  8
Amplifier Requirements:  10 - 100 W
Frequency Response:  55 Hz to 20,000 Hz ±3 dB [at 2m on reference axis (-6dB at 45Hz)]
Sensitivity:  89 dB [at 1m/2.83V (anechoic conditions)]
Maximum Output:  109 dB on programme peaks under typical listening conditions
System:  SP3133
Drive Units:
Bass Unit :  B200 (SP1284),
Tweeter25mm  (SP1231)
Crossover:  SP2177
Dimension (W x H x D) : 490 x 260 x 246 mm (19.3 x 10.2 x 9.7 inches)
Weight:  8.75 kg (19.25 lbs)

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