QED - the sound of science since 1973.
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QED was founded in England in 1973 by Bob Abraham and Ian Vine. its early products consisted merely of a series of audio switching boxes and a speaker cable called 79 strand. However, 79 stand cable became near-legendary and the company now produces a huge range of cables and switching boxes for every eventuality. QED has also entered the Custom Installation market with two distributed audio systems called Systemline and MusiQ.

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