Redeyes, how old is that Bogner ad? It has Dan Spitz on there as Anthrax instead of ex-Anthrax......just made me wonder. Any ideas for a closed back sound with an open back amp? My crunch sounds a little "muddy" but when I add more treble, the brittleness of the solid state circuitry starts to show itself and I back it down again. It works and sounds ok, it could sound better though ya know? Any ideas or can you point me to a site maybe?