RJA, there was a thread about this. The guy from Tubesville modifies the Dunlavy speakers. Here's the thread about what he does.
http://forum.audiogon.com/cgi-bin/fr.pl?rspkr&1028246710&read&keyw&zzblackie
http://forum.audiogon.com/cgi-bin/fr.pl?rspkr&1028246710&read&keyw&zzblackie