The Presonus Studio Channel is a channel strip that features a tube preamp a VCA compressor and a 3-band parametric EQ. The tube preamp section features two knobs: Gain and Tube Drive which allows you to adjust the amount of signal that hits the tube circuitry opening up a wide range of sonic options. The VCA compressor section is well-suited to help all different kinds of audio sit nicely in a mix whether its percussion with fast transients or smooth and silky vocals. The parametric EQ features a custom amplifier with a gain control on each of the 3 bands with a variable Q knob on the mid frequency.