britishele: Description of the loudspeaker - Wireless World 1925

Wireless World, Nov 4, 1925, Page 624.

Hornless Loudspeaker

In putting the Beco hornless loudspeaker on the market, Messrs. the British Electrical Sales Organisation have endeavoured to not only obtain a more pleasing outline than the usual trumpet model but have aimed at eliminating resonance effects as far as possible, with a view to maintaining original sound quality.

The general construction consists of a thick aluminium back plate carrying an adjustable electromagnet with polarising bars. The diaphragm is a stiff aluminium cone less than 0.002” in thickness, rigidly clamped at the rim between thick aluminium rings.

A suppleness is provided around the edge by means of a groove in the diaphragm, and this, resting on wool packing, is probably responsible for the avoidance of resonance.

Moderate in price, it is obtainable either with a nickel-plated, oxidised silver or copper finish.

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