8‐in/20‐out high speed Thunderbolt™ audio interface Record and play back 8 tracks simultaneously Standalone mode allows use as an 8-channel mic preamp and A/D or D/A converter without connection to a computer Support for up to 24‐bit/192 kHz high‐definition audio Near-zero latency audio streaming 8 combo balanced XLR/TRS analog input connectors accept both mic and line‐level signal High‐performance mic preamps with up to +60 dB of amplification Hi‐Z switches allow direct connection of electric guitar or bass (INPUT1, INPUT2) Independent gain controls and clip LEDs for each input Switchable +48V phantom power (INPUTS 1‐4, INPUTS 5‐8) 10 balanced TRS output jacks for connection to mixers, amplifiers, self‐powered speakers, or effects devices Dual front-panel 1/4" headphone outputs with dedicated volume controls Large knob output volume control 4x upsampling during A/D and D/A conversion for reduced noise and enhanced fidelity Asynchronous transfer system unaffected by computer jitter S/PDIF IN/OUT: 2IN / 2OUT, up to 24‐bit/192 kHz audio resolution ADAT Optical IN/OUT: 2 IN / 2 OUT at 192/176.4 kHz (S/MUX4 compatible), 4 IN/4 OUT at 96/88.2 kHz (S/MUX compatible), 8 IN / 8 OUT at 48/44.1 kHz Word Clock in/out Clock source indicator MIDI in/out Rack-mountable (1U space) Robust metal housing Works with all Thunderbolt‐equipped Macintosh computers running macOS 10.14 ~ 13 (Intel Mac only) Specs ANALOG INPUTS: INPUTS 1–8 Connectors: XLR/TRS combo jacks (XLR: 2 hot, TRS: TIP hot) Input gain: 0–60 dB (1 dB steps) Input impedance: 5 kΩ 1 MΩ (When IN1/IN2 Hi-Z on) Maximum input level: +13 dBu (XLR at 0 dBFS) +21 dBu (TRS at 0 dBFS) Phantom power: +48 V