JJ Electronics


JJE 2520J Op-amp


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The JJE 2520J is our version of the famous API 2520 op-amp.   The JJE 2520J is a nine transistor all discrete op-amp.  The circuit topology is faithful to the original with every effort made to make the JJE 2520J sound indistinguishable to our ears from the original. Top shelf transistors, 1% tolerance resistors and high tempature, top quality capacitors are used throughout the build.

All op-amps are built and tested, by hand, in our production facility located in Black Earth, WI.

The JJE 2520J op-amps feature:

  • 2520 standard footprint
  • Power supply voltage range   +-12v to +-18v
  • High power output capability
  • Very low distortion
  • Very low noise

The JJE 2520J op-amp can be used in:

  • Microphone preamps
  • Line amplifiers
  • Combining amplifiers
  • Equalizers
  • Compressors
  • And More!