I'm not familiar with your preamp, so it is tough to make suggetions, as many tubes sound different in different circuits. I will say the best 12AU7 variant I have used in any of my equipment has been the Telefunken ECC802, but I think what you might want to do first is decide what it is about the sound that you want to change, then perhaps ask the manufacturer if they might have some suggestions. Andy Bouwman at Vintage Tube Services is excellent at helping with this as well, as long as he is familiar with the preamp, if you decide to go the NOS route.
Best 12AU7 Type Tubes for a Preamp
I am hoping for some help finding good quality and good sounding 12AU7 variant tubes for a preamp – I need two tubes. A price of around $100 each or less would be great but I would pay a bit more (150 ea.) for something that is likely to sound better. The unit came with JAN PHILIPS ECC82 (12AU7/5963) and I also own a pair of reissue/new Mullard ECC92 tubes. Both sets are quiet but I am wondering if there is something even better sounding at a moderate price.
Readily available NOS options I have seen include:
- NOS RCA Blackplate or Clear Top at about $100-150 EA.
- Amprex 7316/ECC186 at around $150 each, and
- Mullard CV4003/12AU7 $150ea.
New options I have found (in addition to Mullard) include (among others):
- Genalex - Gold Lion B749 / ECC82/12AU7, $70 ea.
- Psvane 12AU7-S Art Series ECC82, $55 ea.
Thanks for any help.