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 C-20

 Larger than the C10, and therefore able to use a 200mm bass/midrange unit, the C20 showed many similarities to its smaller brother, but with the greater cabinet volume allowing increased bass capability and higher sensitivity.
The C20 was the classic bookshelf speaker in size, performance and price, and showed just how good the performance can be from a modest economical system.
 The new B200 bass/mid unit uses a polypropylene diaphragm to reduce colouration, while a new  high sensitivity, which in combination with equalisation and computer optimisation gives a flat frequency response with the modest bass and lower-midrange reinforcement provided by a rear wall.
 Attractive modern design and a high standard of finish combine with finely balanced performance, taking advantage of the latest technologies in design and manufacture.
Specification: C20
System Type: Two-way, bookshelf/stand-mount
Enclosure type: Closed box
Nominal Impedance: 8ohms
Rated maximum power: 100W programme
Frequency response: 72Hz to 400Hz +/-3.0dB rising 3dB to 800Hz-20kHz +/-3dB (-6dB at 58Hz)
Sensitivity: 90dB for a pink noise input of 2.83V (under wall-mounted conditions)
Maximum output: 110dB on programme peaks under typical listening conditions
Finish: Simulated Walnut, Rosewood, Black Ash
System: SP3053
Drive units: B200 bass unit (SP1200), T33 tweeter (SP1211)
Crossover: SP2053
Size: 340 x 247 x 212mm (13.4 x 9.7 x 8.4 inches)
Weight: 6.5kg (12 lb)
Produced:  1985 - 88

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