Don,
Afc makes a good point regarding the Shuguang Treasure series(black glass) tubes. I use these also, as good as the stock 300b is the treasure tubes are better in every way. They`re more dynamic, open, natural and transparent. They reveal just how low the noise floor of the amp really is. You`ll hear the most subtle nuance and inner details that seem to make the music come alive. the only down side is increased cost, but they`re worth it.
Afc makes a good point regarding the Shuguang Treasure series(black glass) tubes. I use these also, as good as the stock 300b is the treasure tubes are better in every way. They`re more dynamic, open, natural and transparent. They reveal just how low the noise floor of the amp really is. You`ll hear the most subtle nuance and inner details that seem to make the music come alive. the only down side is increased cost, but they`re worth it.