Thomas,
when I have a group of audio friends over to test out all my 2a3 and 300B tubes..My system contain the cary 2a3,cary slp98(at the time of testing) and cary 2a3 amplifier.we test the Kr audio 2a3 tubes/RCA/CBS/sovtel/EH gold grid and AVVT..The difference between these tubes on my avantgarde uno horn are so subtle that not worth mentioning,but when we try it on the box speaker( triangle celius),we can hear the differences between these tubes..AVVT sound the best...EH gold grid is not bad for the money..hope this help
when I have a group of audio friends over to test out all my 2a3 and 300B tubes..My system contain the cary 2a3,cary slp98(at the time of testing) and cary 2a3 amplifier.we test the Kr audio 2a3 tubes/RCA/CBS/sovtel/EH gold grid and AVVT..The difference between these tubes on my avantgarde uno horn are so subtle that not worth mentioning,but when we try it on the box speaker( triangle celius),we can hear the differences between these tubes..AVVT sound the best...EH gold grid is not bad for the money..hope this help