Lightminer, here is something else to consider:
http://www.atma-sphere.com/papers/paradigm_paper2.html
IOW, a speaker that is designed for transistors may not work with tubes without tonal anomalies, and I for one (if doing the test) would insist on one of our amps against his transistor 'control sample'.
In order to do that, its likely that the tube amp should be on a speaker designed for tubes.
I don't know how you could conduct a valid test unless you had a at the very least a speaker that was equally friendly to tubes as it is to transistors. My guess is all these tests were done transistor vs transistor- I'm pretty sure I'd be hard pressed to accurately tell the difference.
http://www.atma-sphere.com/papers/paradigm_paper2.html
IOW, a speaker that is designed for transistors may not work with tubes without tonal anomalies, and I for one (if doing the test) would insist on one of our amps against his transistor 'control sample'.
In order to do that, its likely that the tube amp should be on a speaker designed for tubes.
I don't know how you could conduct a valid test unless you had a at the very least a speaker that was equally friendly to tubes as it is to transistors. My guess is all these tests were done transistor vs transistor- I'm pretty sure I'd be hard pressed to accurately tell the difference.