so i just bought an old Lang 5 Channel Tube Equalizer. Cool little unit, never seen one before. its basically a tone control, five mono channels of high and low boost and cut, at 5K and 100Hz. Comes in really handy for lots of stuff.
My question, each channel uses a 12AX7 tube and i'm guessing these tubes are pretty worn out. Any suggestions from you guys on what the best replacement tube for this EQ would be (as in, what manufacturer, exact tube, etc....). Any help would be much appreciated, i dont know much about the technical side of these things.