NOS Mullard ECC83/12AX7 CV4004 1960s
NOS in original boxes.
Mike: I ordered more of these because these are the best Mullard 12AX7-style tubes I think I’ve ever heard. In lay terms, they are completely devoid of noise and microphony. Clearly a stout, truly NOS tube that does the term “NOS” proud and that will be at home in many different kinds of amplifiers. Wow! Cheers, Mike