The PreSonus Studio 1810c is an 18x8 USB-C audio interface perfect for mobile recording and project studios. It features 24-bit/192 kHz audio, 4 XMAX Class-A mic preamps, ADAT expandability, and onboard DSP mixing, all housed in a rugged chassis. Brand new units typically retail around \(\$420\).Key Hardware & SpecificationsSimultaneous I/O: Records up to 18 inputs and 8 outputs.Preamps: 4 front-panel combo mic/instrument/line jacks with individual gain knobs and +48V phantom power.Analog Inputs: 4 dedicated rear-panel 1/4" TRS line inputs.Digital I/O: 8 channels of ADAT optical and stereo S/PDIF.Outputs: 2 main 1/4" TRS outputs, 4 balanced DC-coupled line outputs, and 2 independent headphone outputs with A/B switching.