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The TranZformer GT is a multifunction pedal that is designed to easily and affordably bring...

2 channel compressor featuring API’s patented THRUST® circuit

2 channel, 4-band equalizer modeled after the classic APSI model 562 EQ

API’s legendary EQ circuit, incorporated in a versatile guitar effects pedal

API’s legendary VCA compressor, incorporated in a versatile guitar effects pedal

2 channel, all-tube, Class-A microphone preamplifier designed with API’s proprietary AP2516 transformer

2-channel, FET feedback-style compressor/limiter with a Class-A tube output stage that utilizes a custom API...

API’s legendary EQ circuit, incorporated in a versatile bass effects pedal

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

4-band Parametric EQ based on the classic APSI 562 EQ