On Fri, 07 Aug 2009 12:56:52 +0100, Jim Lesurf
wrote:

Yes. Hence my reference back to the 'SCAMP' article. Loudspeaker designers
have a lot to answer for, but rhwy usually chuck the problems onto the lawn
of the amp designers and pretend it is nothing to do with them! 8-]


All it would take is a 22nF cap in series with 8.2 ohms across the
speaker terminals. A turnover frequency about 1MHz, and virtually no
power to dissipate. That would certainly tame the out-of-band
impedance of your Spendor LS3/5A nicely.

d