(!!!!!) (Recommended Single) M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966 (Gm=1500/1400 and 1.0/0.8mA)
$199.99
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1 low noise tube) M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966 Gm=1500 (1.0ma) Gm=1400 (0.8ma) Good mA = 0.9-1.0mA+ Good Gm range = 1500-1600+ 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
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