The STK VFX-256 Digital Signal Processor is a rack-mountable audio effects unit designed for live sound and studio applications. It features multiple inputs (XLR for mics, RCA, and 1/4″ TS) and outputs (1/4″ TS and RCA), MIDI connectivity, and an effect level control. Powered by AC 9V 500mA, it’s built for professional audio processing and was manufactured in Korea.