VPI 16.5. Here is one of several threads on Audiogon about the same topic. Do a search to find others.
[url]http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1345881716&openflup&9&4#9[/url]
[url]http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1345881716&openflup&9&4#9[/url]