ClassicAPI 4 Channel Summing Amplifier

Projects > ClassicAPI 4 Channel Summing Amplifier

The ClassicAPI JLS Inv-ACA PCB contains four active combining amplifiers (ACA) which are bussed into one output. You can use these ACAs to sum many channels into small groups before hitting ClassicAPI’s 2-mix amplifier.

Notable Features:

  • Faithful replica of the ACA circuit from vintage API consoles
  • Each PCB uses four 2520-style opamps
  • Mounts easy on vintage API ACAs
  • Can also be used at two 2-into-1 summing amplifiers

Price: $12 for PCB
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