Yamaha MG10XU 10-Input Stereo Mixer with Open-Ear Headphones On-board processors : SPX algorithm: 24 programs Phantom power : +48 V Digital I/O : USB Audio Class 2.0 compliant, Sampling Frequency: Max 192 kHz, Bit Depth: 24-bit Mono[MIC/LINE] : 4 Stereo[LINE] : 3