A small loudspeaker with the bass sound of a speaker three times its size has
been developed by a British company. The secret is simple: the speaker cabinet
is filled with bags of activated carbon. A loudspeaker cone is like a piston,
pumping in and out. Larger loudspeakers have a stronger bass because the air
inside a large cabinet damps this piston less than the small volume of air in a
compact cabinet. Now a company called KEF has found that putting bags of
activated carbon in the back of a small cabinet makes it sound three times
bigger. It…
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