Big Knob Series, Passive 2X2 Studio Monitor Controller (BIG KNOB PASSIVE). Excruciatingly simple 2×2 monitor controller. Choose between two sources and two monitor pairs. Classic Big knob volume control. Mackie BIG KNOB PASSIVE benefits from a proven, bestselling design to deliver professional level control, Plus source and monitor selection for studios of any size. 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 “Built-Like-A-Tank, ” affordable monitoring control solution. 8.3 x 7.8 x 4.9 inches. Product Dimensions: 7.8 inches x 8.3 inches x 4.9 inches. Weight: 1.0 kg. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your satisfaction is guaranteed! All of our items, unless otherwise stated, will only run on 120 volts. Please check to make sure your country complies with these specifications. We will work with you to resolve any problem you may have.