(!!!!!) (Best Pair/Best Price) 12AX7=ECC83 Philips Holland NOS 1966 same date codes (1.4/1.4ma and 1.4/1.3ma) 1-3% matched

1 low noise pair) 12AX7=ECC83 Philips Holland NOS 1966 same date codes 1 tube) Gm=1800/1800 (1.4/1.4ma)  1 tube) Gm=1900/1800 (1.4/1.3ma)   NOS Gm = 1600+ NOS mA = 1ma+   Recommended for - EAR 834P- EAR 864- Aestetix Rhea phono- Aestetix Calypso, Io phono- Art Audio phono- Audio Research linestage - Shindo linestage- Jolida 1000 CD player- CAT SL-1 Signature Mark III preamp- Fender Pro Reverb 1967- Pathos Acoustics T.T. Hybrid Integrated amp (INPOL)- Belari 129 phono - Art Audio MPA Gold pre- Fender Tremolux 1963- Jolida