Phil Leigh Wrote: > > The point is that a speaker in a cabinet which has a resistive loading > (air in the box) behind it and a different resistive loading (air in the > room) in front of it, the designer will be expecting to compensate for > the difference between the two and the impact that has on the movement > of the cone. If we move the nominal zero point forwards or backwards > with DC we change the rules of the game in a way that the designer > could not expect and will not have compensated for. Of course, in > passive x-overs the DC will have other effects and I'm not sure if > they'll be directional or not...that's probably another thread. >
Yes, I understand what you are saying. However there is what essentially amounts to a law of nature which says that small oscillations around an equilibrium point are always harmonic. The key is of course the word small, but I think my point above stands - if the DC offset is not larger than an AC level the speaker can handle without distorting significantly, I don't think there will be significant asymmetry from the offset. By the way, here's a quote from the link above which sums things up nicely: > > And from Dr Floyd Toole: > > It turns out that, within very generous tolerances, humans are > insensitive to phase shifts. Under carefully contrived circumstances, > special signals auditioned in anechoic conditions, or through > headphones, people have heard slight differences. However, even these > limited results have failed to provide clear evidence of a 'preference' > for a lack of phase shift. When auditioned in real rooms, these > differences disappear..." > > Essentially, Dr Toole expressing the opinion he does here (based on > decades of his own, often groundbreaking research), captures the > essence of the conclusions reached by Lipshitz et. al. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=22118 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
