Golden Earring wrote: > Thanks for prompt response. > > I suppose the massive magnets affixed to the drivers in close proximity > to the voice coil, plus the fact that there will usually be cone motion > induced by simultaneous higher frequencies in actual programme material > creating a bit of a draught in the vicinity means that overheating is > unlikely in practice. > >
Large magnets are not necessarily the sign of good engineering. The magnet size needs to be optimized, not necessarily large. Magnet assemblies can be part of the heat transfer process, but they don't actually touch the voice coil so other approaches that do touch the voice coil can have a better price/performance. Thermal considerations are addressed many ways in modern woofers, but adhesives is one technology has moved forward in a big way and provided good results. Note that magnetic fluid is generally not used in subwoofers because it causes too much damping. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=106914 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
