A true all-rounder from Mackie's ONYX range. 12-channel analogue mixer with built-in USB audio interface, allowing you to record your multi-tracks to a DAW or a stereo mix to built-in SD card. Supplier's Notes: Incredible sound quality, multitrack recording, and professional built-in effects make Onyx Premium Analog Mixers with USB the ultimate compact, affordable solution for live audio, home recording, and content creation. If there's one thing Mackie engineers can do in their sleep, it's design a mixer that sounds great, is easy to use, and is packed with flexible features. Sounds pretty good right? So if you mix live sound, record in your home studio, or live stream, this is the heart of your audio. Onyx Series mixers feature bright, easy to read buttons that shine bright in the darkest places so you will always know whats going on with your mix. On top of that, the full-color display of Studio Command makes it easy to adjust effects and SD card recording/playback. To create the Perkins EQ, Cal Perkins started with the Wien Bridge circuit topology - a very musical design inspired by the hallowed "British" desks of the 60s and 70s. This design essentially trades boost/cut capability for a wider, highly musical Q filter. After a mind-numbing amount of math, Cal was able to specify capacitor and resistor values that would give the EQ an extra 6dB of control (i15 dB) without excessively narrowing the "Q" or bandwidth of the filters. Line inputs: 10 Mic inputs: 4 Aux sends: 1 Compressors: 2 USB I/O: 12x4