(!!!!!) (Recommended Pair 1960) 12AX7/A Amperex Bugle Boy Holland used/like new condition large "O" getter halo 1960-1961 (1.0/0.8ma and 0.9/0.9ma) 1-3% matched (same Gm)

1 low noise pair) 12AX7/A Amperex Bugle Boy Holland used/like new condition large "O" getter halo 1960 - excellent printing 1 tube) Gm=1500/1500 (1.0/0.8ma) (delta0K2) 1960 - 12AX7A 1 tube) Gm=1500/1500 (0.9/0.9ma) (delta0K1) 1960 - 12AX7   Good used Gm = 1500-1600 Good used Ma range = .8 - 1.0ma   - very good bass, lively mids, 3D soundstage, dynamic, engaging   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