To make sure that you sound perfect, the Mackie ProFX16v3 has an onboard effects processor. The effects processor has a blend function, FX level control, and a quick mute switch. The GigFX effects engine offers up 24 different effects ranging from delays, reverbs, choruses, distortion, and even an auto-wah feature. All of these effects are accessed by a simple twist of the Presets knob.