6C4 | M8080 Preamp Vacuum Tubes

Below is our current selection of 6C4 preamp tubes. Other 6C4 tube equivalent part numbers are EC90, 6135, and M8080. For more information on 6C4 / EC90 / 6135 / M8080 vacuum tubes including pinouts, ratings, application and possible substitutions visit 6C4 in Duncan Amps.