One of the things that piques my curiosity with the WA2 is the use of rectifier tubes (2). How does this affect sound quality? Is the WA2 "two WA3s on one chassis" or something more?
I happen to also have a WA6, which is a transformer-coupled amp that uses a rectifier tube, and I can confirm that the rectifier tube does indeed make a difference to the sound. I don't really understand why this happens since a rectifier should basically convert AC current to DC, but different rectifier tubes do sound different, so there is something going on that affects the sound.