I use Mullard CV4004s in the phono section of my VTL tl5.5 and like them just fine. They are a big improvement from the Sovtek 12ax7s that were in there when I got it. The Mullards are quiet and have a nice full mid range and a smooth top end. I used to use them in the line stage but I found I like early '60s Tung Sol (American) grey plates 12ax7s better. My preference in general as been for early 60s American tubes to the "CV" Mullards and 60s Telefunkens I have tried.
