The Preceptor model-A (Aggressive) is a two-channel, class-A compressor/limiter. Gain reduction is handled by a discrete VCA design based on Zener diodes and bipolar transistors. There are 16 preciesly matched Zener diodes on board! The Gem Audio Labs Preceptor Model-A compressor/limiter looks right out of the early '70s. Its stepped knobs dole out satisfying clickage and its dual VU meters bathe your console in a warm yellow glow. Hand-built using premium parts, the Preceptor juices whatever you send its way with warmth and sheer size. if you were looking to add aggressiveness and color to your final 2-Mix. If you’re looking for a versatile, great-sounding compressor/limiter, give Gem Lab Audio’s Preceptor Model-A a try.