Sound quality has little to do with current (otherwise the tube industry would have died decades ago) and has everything to do with distortion. That is a topic for a different thread.
'Current' is an issue about which there is a lot of mythology. see:
http://www.atma-sphere.com/papers/myth.html
'Current' is an issue about which there is a lot of mythology. see:
http://www.atma-sphere.com/papers/myth.html