Listening to these unique power amps, was one of the highlights of my Queensland visit. What do you get from amps like this, A single ended sound with all the benefits of power. These amps have a lot of power and you can hear it in its relaxed presentation, so liquid you can cut it with a knife, a huge sound stage with max body and warmth that envelopes you in the music without a hint of strain, a wall of sound that you really can immerse yourself in. I think that a great plus for this type of amp is that you can drive most speakers on the planet and do not have to worry about efficient drivers. One draw back is the price of these tubes (STC4212Es) I wonder how expensive the western electric (212E) versions are.