Great V1 & Phase Inverter
I have used this guy for V1 and the phase inverters in several amp (Marshall jubilee, B52 AT100, Bugera 333XL Infinium and others). Not as high gain as Tung-Sols or Electro Harmonix, but very quiet and full sounding. It will work in the gain stages, but for really saturated distortion, this won't provide it. They'd be great for 'cleaner' players in all spots. Construction and sound is 'similar' to the Mullard reissue. I noticed no difference between the two.