Sound diffusion systems - Subwoofer, woofer, midrange, tweeter

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The dimension of the membrane strongly conditions the functioning of a loudspeaker. The greater the dimension of the membrane and its mass, the smaller its resonance frequency, which in turn implies that large membranes are ideal for reproducing low frequencies, whereas they are quite useless for the reproduction of high frequencies. From this comes the subsequent sub-division of loudspeakers into three main categories, each of which is deputed to the reproduction of a specific band of the audible spectrum.

Woofers are the kinds of loudspeakers used for the reproduction of low frequencies. They have a relatively large membrane: the larger the membrane the smaller its resonance frequency, therefore the more extended towards the low frequencies is the band the loudspeaker can reproduce.

Clearly, the larger the membrane is, the greater the quantity of air moved by it, and therefore more power is needed to adequately feed the loudspeaker. Sometimes loudspeakers created for reproduction of very low frequencies (20 Hz-40 Hz) are used. They are called subwoofers. The loudspeakers used for the reproduction of middle frequencies are called midranges. They are smaller in size than woofers, and have lighter membranes. Lastly, for the reproduction of high frequencies, loudspeakers called tweeters are used whose membranes are very small.








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