Zoom TAC-8, Thunderbolt Audio Interface and Standalone AD / DA Converter, 18 inputs and 20 outputs (total, digital and analogue), 24bit / 192kHz, 8 Analog inputs - combines XLR / 6.3 mm jack for microphone and instrument signals, Microphone preamplifier with up to +60 dB gain, 48 V phantom power separately switchable for groups 1-4 and 5-8, Input 1 and 2 also for guitar and bass, 10 analogue outputs sym. Jack 6.3 mm, 10 digital inputs and outputs, Word Clock input and output, Very low latency, 2 headphone outputs 6.3 mm jack, 4-fold upsampling during the AD / DA conversion, 1x S / PDIF input / output with up to 24bit / 192kHz resolution, 2x ADAT Optical input / output: 2 channels at 192 / 176.4 kHz (S / MUX4 compatible), 4 channels at 96 / 88.2 kHz (S / MUX compatible), 8 channels at 48 / 44.1 kHz, MIDI input and output, Metal case, Dimensions: 19 ""1U, Compatibility: Apple computer with Thunderbolt interface, OS X 10.8.5 or later