At the link below you'll find a thread wherein I describe a speaker I'm no longer commercially involved with that will play incredibly loud with no nasties. The only other system I've heard that can duplicate this feat is about sixteen times the price (and requires commensurate amplification), and is no longer in production. The speaker I'm talking about is called the Summa, and it's designer also posted in this thread.
http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1128757355&openflup&7&4
Duke
dealer/manufacturer
http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1128757355&openflup&7&4
Duke
dealer/manufacturer