Used Mackie Big Knob Passive Volume Controller

Take command of your monitoring with this used Mackie Big Knob Passive Volume Controller in great condition. Designed for transparent, no-power operation, it delivers smooth, precise level control for studio monitors and headphones without adding coloration. Simple, rugged, and easy to integrate, it features multiple stereo input and output source/monitor switching, a large ergonomic knob, and balanced TRS connections for clean signal flow—ideal for project studios, editing suites, and critical listening setups.