The best I have used and currently use are white label Amperex 6922's (late 50's/early 60's vintage) and Mullard CV 4004's in the 12AX7 slots. I also have the notorious Mullards 10M gold pins (12AX7), but found them to be a bit slow for my tastes.
Strongly recommend you buy from a reputable & knowledgeable tube dealer (Brent Jesse Recording, TubeWorld, & Vintage Tube Services). It may cost a bit more, but you'll know your getting the real deal.
Strongly recommend you buy from a reputable & knowledgeable tube dealer (Brent Jesse Recording, TubeWorld, & Vintage Tube Services). It may cost a bit more, but you'll know your getting the real deal.