Sovtek 5751

Lower gain 12AX7 sub with a gain factor of 70. The long plate makes it great in the phase inverter spot, a position which can impact the overall feel of your amp. Avoid these in high voltage cathode follower(CF) spots, these cannot withstand prolonged high voltage. They also don't appear to light up because of the spiral filaments, please listen to your amp before emailing us about a DOA tube!