The passive audio path ensures pristine sonic integrity is maintained throughout your signal chain.  More than just a level control solution, Big Knob Passive features the ability to choose between two sources and two monitor pairs. Ideal for simple level control at a home or project studio or for integration in a large studio or group of editing suites, Big Knob Passive is the œBuilt-Like-A-Tank, affordable monitoring control solution. Features: 2x2 monitor controller with classic Big Knob volume control,,, Choose between two sources and two monitor pairs,,, Professional mono, mute and dim functions,,, Passive audio path with no power supply needed,,, Sturdy œBuilt-Like-A-Tank design ,, ,, Get your Mackie Big Knob Passive Monitor Controller today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.