@dekay I’ve never noticed the raised lettering in the bottom of my TAD Red Base EL34s - I’m now curious.
I can’t say much about the sonic signature of these tubes since I was previously running KT88s in my amp. I will say that these EL34s have been reliable over the course of the past 9 months with long use during the weekends. If I remember correctly I paid just under $200 for a quad from Viva.