Krakin Posted March 7, 2014 Report Share Posted March 7, 2014 Progressive spiders get stiffer the further they travel. Linear spiders retain the same stiffness as they travel. I think you said that backwards. A progressive roll spider is designed to keep the stiffness of the suspension as constant as it can throughout the coil's motion. The further the coil moves, the more useful it is, so they are more common in longer-throw subwoofers. It is still useful, though, in virtually any speaker that seeks more "clean" throw than other speakers of a similar size. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
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