The NU is the 1st 6F8G I have tried so I am unable to compare it to others. I find the NU to be well balance tonally with outstanding midrange. I am a bit surprised at the difference the rectifiers make in the ECBA. I can hear a bigger difference in the 6X4 than in many of the 6SN7's I have rolled.
5/8/13 at 4:09am