JJ Electronic ECC81 (12AT7) Preamp Vacuum Tube
The ECC81 is a 12AT7 medium gain pre-amplifying double triode. It can also be used as a replacement for 12AX7 in many applications. It is very smooth, with a warm sound and low microphonics, and is good for phase inverters or reverb drivers.
ECC81 - 12AT7