The gray Mackie Big Knob Passive is a monitor controller that allows you to choose between two audio sources and two monitor pairs. It can be used in project and professional studios and is designed to increase your workflow for recording and mixing applications.

It features mono, mute, and dim functions and delivers pristine audio quality. Built with the classic Big Knob volume control, it is designed with a passive audio path, which requires no power supply. The Big Knob Passive studio monitor controller is sturdy and has a built-like-a-tank design.

The Big Knob Passive features a download for Waveform software and the DAW Essentials Collection, which includes 16 contemporary FX plugins including EQ, Compression, Delay, Limiter, Flanger, and more. To authorize the software, simply input the mixer's serial number on the website.