What Is The Difference Between 12AX7 And 12AY7?
What Is The Difference Between 12AX7 And 12AY7? The 12AY7 tubes are not 12AX7’s and have many different properties. They draw more current than a 12AX7 as well as having different internal capacitance between elements and a different plate dissipation. Because of these differences, they sound different in a circuit designed for a 12AX7 tube.