The Access 312 is a PCB which allows for many variations on the basic API 312-type mic preamp. By choosing their own transformers and opamps, the builder can create their own take on the “API sound.”

Notable Features:

• Accepts any API 2520-style opamp, including those from API, ClassicAPI, Whistlerock Audio, John Burdick, JLM Audio, Purple Audio, etc…
• Accepts transformers from Cinemag and Ed Anderson (ClassicAPI), among others
• Fits four in a 1RU case

Price: $20 for PCB

More info: PCBs available from the creator’s White Market store