What Are The Best 12AT7's and 12AX7's?

What tubes are in there now? I am a Mullard man, so I always recommend the Mullards for most applications. I get these from Kevin at Upscale Audio.

http://www.upscaleaudio.com/products/Mullard-CV4024-%7B47%7D-12AT7.html

http://www.upscaleaudio.com/products/Mullard-CV4004-%7B47%7D-12AX7-British-New-Old-Stock.html

I have also have just tried the Psvane tubes from Grant Fidelity and really like these too.

http://psvanetube.com/wordpress/?page_id=148

Considerable improvement with the right tubes. I also bought Mullards from Kevin at Upscale. At that time I had a Prologue Three it was night and day difference. Good Luck.

I can't comment on 12AT7's because I never had a piece of gear that used them.

I have in my 12AX7 collection over 50 pairs of tubes from all the European and American companies. Famous Mullards, Amperex Bugle Boys, Telefunkens, Mazdas, etc.

If your piece can use 5751's I have found no tube that offers the sound of music better then these two: 1) Sylvania Gold Brand 5751's either gold or silver pins. 2) Mazda 5751 chrome plates.

They are not inexpensive, but not horrible expensive, and are so much better then even the highest regarded standard 12AX7's regardless the maker or time era. The Mazda's are very hard to get,but you should be able to score the Sylvania's. Remember not just Sylvania, but labed Sylvania Gold Brand 5751's.

agree with above

the 4004 have a big, golden sound that is very pleasing.