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Re: I never fully appreciated the curve of Sound Labs

There is no curve to the membrane in Sound Labs whatsoever: each vertical section is flat, angled slightly from the ones next to it to give an effective arc, without the inherent shortcomings of a truly curved membrane (more on the Sound Lab website on this). The edges of the support ribs are curved, against which the grille cloth rests.

The spacing of the vertical support ribs, combined with the angle from one section to the next, were worked out long ago such that no beaming or 'picket fence' effect could be heard. The result is a virtual line source (this radiating principle was intentionally designed in by Dr. West, for psychoacoustic reasons as well as reducing room interaction) which gives dramatically different results from that of flat panel speakers.

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