Exceeded high expectations!
I put this Northern Electric in my Vox AC4TV, along with the JJ EL844 low power tube. What a difference - from a huge decrease in ear fatigue and a somewhat harsh high end to a much more balanced and articulate range. With the power reduction imparted with the EL844, this little amp really does have a rich smoothness to the distortion even when driven all the way and has that elusive tone I was looking for in my practice amp. The family and neighbors can't appreciate the difference - because they can't really hear my playing at all any more - but I get all the amazing tone I want at a truly low practice level.