What are you currently using for 12AU7's? My favorites in descending order are:
1) Telefunken
2) Amperex Bugle Boys
3) Mullard (please note that the CV4003's in the white boxes and sometimes called 'mil-spec' ARE NOT NOS, but modern crap manufactured in the '80's, and usually sold for obscene profits. No Mullard label on these dogs!)
4) RCA 6189's
The Telefunkens have it all...deep clean bass..airy and extended highs, and an incredible presentation of soundstage. Be careful, as there are many fakes out there. Be prepared to spend $200- and up, for a genuine NOS matched pair from a reliable source, if and when you are able to find them!
1) Telefunken
2) Amperex Bugle Boys
3) Mullard (please note that the CV4003's in the white boxes and sometimes called 'mil-spec' ARE NOT NOS, but modern crap manufactured in the '80's, and usually sold for obscene profits. No Mullard label on these dogs!)
4) RCA 6189's
The Telefunkens have it all...deep clean bass..airy and extended highs, and an incredible presentation of soundstage. Be careful, as there are many fakes out there. Be prepared to spend $200- and up, for a genuine NOS matched pair from a reliable source, if and when you are able to find them!