JJ preamp tube with low noise and low microphonics. Great for phase inverters, reverb circuits, or any application which calls for 12AT7 tubes.
NOTE: If the kit includes more than one POWER TUBE, then they (the power tubes) will be APEX Matched. NOTE: Some tube Acronyms are interchangeable - for instance: 12AX7 is the same thing as ECC83; 12AT7 = ECC81; GZ34 = 5AR4. There are others, but these are the most notable.