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Discrete compressor with variable attack and release.

16-Channel Analog Summing Mixer based on the summing section of THE BOX® Console

DI designed specifically to accept guitar, bass, or keyboard signals with unique TONE control

Classic API Microphone Preamp design with switchable 3:1 Output Transformer and variable output level control

Original compressor circuit designed for the ATI Paragon Console with API’s patented THRUST®...

VCA based Compressor/Limiter with API’s patented THRUST® circuit

Exact reissue of API’s original 525 “Feedback” type compressor released in the early 70s

API’s Classic 312 Microphone Preamp in a 500 Series module

Classic API Microphone Preamp design in 500 series format

Line Amplifier modeled after API’s highly prized console-based 325 booster cards

10-band Graphic EQ based on the original API 560 EQ

3 bands of classic API equalization