I have a Link to a Korneff page at the bottom here. I have heard the 45 amp with a few different speakers and in most cases this is a great amp and sounds wonderful. Very well build. I did here the 45 with a Theater Pi4 and thought the bass was too heavy and unrealistic. Just a bad match in my opinion. I think a premium stage Pi4 would have sounded a little tighter. For high end amps, who knows? Its all about prefferanc since there are so many circuit designs and good parts that need to be configured to a delicate match. I have a Audio Note 300B amp and although I have not listened head to head against a Korneff 45, I am happy with what I have for sure. Jeff does great work and if you have speakers sensitive enough to play modestly with a 45 tube, its a sweet tube to work with. I think I may pick up one of those ASL kits! I love building electronic kits and some day everything in my system will be hand build

Bill

• http://groups.msn.com/korneffvacuumtube