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Post by ThomasW on Jul 3, 2006 12:52:44 GMT -7
Is it as simple as they make it out to be? Can you really get the same results with feet of distance between the drivers? Acoustical coupling itself provides +3dB of gain. You get +6dB IF the amplifier doubles it's output when powering the second driver.
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jcd
New Member
Posts: 28
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Post by jcd on Jul 3, 2006 13:28:26 GMT -7
At the Genelec site I found the following "When two or more subwoofers...are positioned close to one another mutual coupling is the fortunate by-product. This is due to the long wavelengths, associated with low frequencies, causing constructive superimposition. For mutual coupling, the subwoofers must be placed within ½ a wavelength of one another (85Hz upper crossover frequency ½ wavelength is approximately 2m). For example, two subwoofers give a 6dB increase in acoustical output at the listening position..." Is it as simple as they make it out to be? Can you really get the same results with feet of distance between the drivers? That is an interesting equation to have handy.. So, if I were to assume I'd have a cutoff of 80Hz, and I wanted to make sure my drivers all coupled, I'd have to make sure the drivers were within 6.9ft (=1100/80/2) of each other. Assumes 1100 ft/sec is speed of sound.. I love learning new stuff.. JCD
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