6N4 = ECC83 / 12AX7A NOS (square getter)
the 6N4 was made in Peking till 1996 and has been used as stock tube from most guitar amp manufacturers including Fender, Marshall, Mesa Boogie, VOX, Diezel, Engl, Hughes&Kettner and so many more. Its trademark tone is that crisp and bright top end. Sometimes a bit to crisp for high gain distortion but unbelievable clear for perfect clean tone. Also for HiFi audio applications if you seek a clear tone with lots of details and not an overemphasised base.
RESELLER BOX CONTAINING 100 TUBES