Features 8 mono mic/line channel inputs, each with: High-headroom Class A XMAX mic preamplifier XLR mic and balanced ¼-inch line inputs 60 mm precision fader 4 stereo line channel inputs, with: High-headroom Class A XMAX mic preamplifier (Ch. 9, 11, 13, and 15) XLR mic inputs (Ch. 9, 11, 13, and 15) Balanced ¼-inch line inputs (Ch. 9-16) Unbalanced RCA line inputs (Ch. 13-16) 60 mm precision fader (4 stereo) 4 Auxiliary buses (pre/post-fader send) 2 Internal FX buses 2 stereo 32-bit digital effects processors with customizable reverb and delay presets Fat Channel signal processing on all channels and buses, with: 3-band semi-parametric EQ (individual band on/off) Full-featured compressor Standard downward expander Limiter Phase reverse (12 mic preamplifiers only) Pan with dedicated 15-LED display Stereo link for input channels and aux buses Highpass filter One 31-band stereo graphic EQ (on main outputs only) 18-in/16-out USB recording interface (24-bit/44.1 kHz and 48 kHz) Compatible with most audio software via ASIO, Windows Audio, Core Audio Scene store and recall Settings can be copied among channels and buses and saved as user presets. Software bundle includes: PreSonus® Studio One® Artist digital audio workstation for Mac® and Windows ® PreSonus Capture™ live-recording software for Mac and Windows PreSonus UC Surface mixer-control software for Mac, Windows, Android™, and iPad® Free downloadable PreSonus QMix®-UC software for iPhone®/iPod touch® and Android™ provides wireless remote control of aux mixes Lockout mode protects your settings from meddlers and accidents MIDI Control Mode provides control over:Scene and FX Preset recall. Main Volume, FXA, and FXB output levels. FXA and FXB assign/unassign to Main