On Tue, 06 Jan 2004 21:35:30 +0100, Peter Larsen
wrote:

Stewart Pinkerton wrote:

On Tue, 06 Jan 2004 13:18:10 +0100, Peter Larsen
wrote:

Metal is as poor as kevlar unless you are very good at making
cross-overs. If you are very good at making cross-overs then something
that is rigid in the pass band is attractive.

The B&W Kevlar drivers are not rigid in the pass band, they are
*designed* to move into bending mode.

Yes, yes, yes, kevlar units (x) tend to have a nice smooth drastically
rising response because of that well designed breakup, but eventually
things do get to steep dips, the major issue is of course the rising
response, they are possibly not heavy enough to remain linear when
breaking up ... it would be great if somebody could explain this better.

This is nonsense. *All* pistonic drivers have a 3dB/octave rising
response due to directivity changes as the radiated wavelength
approaches the diameter of the cone. This has *nothing* to do with
movement into bending mode, which in fact corrects this rise by
progressively reducing the radiating area with increasing frequency.
--

Stewart Pinkerton | Music is Art - Audio is Engineering