Universal Audio Apollo x6 Heritage Edition, 16 x 22 Thunderbolt 3 Audio Interface, Compatible with Thunderbolt 2 with optional Thunderbolt 2 to 3 adapter (not included), Support of surround formats up to 7.1, with speaker calibration and downmix, Dual crystal clocking for low-jitter environment and clean, artifact-free recordings and stable stereo imaging, 6-Core SHARC DSP for internal UAD real-time processing, 2 Unison microphone preamplifiers, 2 Microphone inputs: XLR, 2 Hi-Z inputs: 6.3 mm jack, 6 Line inputs: 6.3 mm jack, 2 Monitor outputs: 6.3 mm jack, 6 Line outputs: 6.3 mm jack, S/PDIF coaxial input and output, 2 ADAT inputs and outputs, BNC Word clock input and output, 2 Stereo headphone ports: 6.3 mm jack, 2 Thunderbolt 3 ports, +48 V Phantom power, Pad, Low-cut, Phase reverse, Switch for monitor switchover, Function key can be assigned to Dim or Mono, LED Meter, Integrated talkback microphone, Support of surround formats up to 5.1, with speaker calibration and downmix, Dual crystal clocking for low-jitter environment and clean, artifact-free recordings and stable stereo imaging, For Mac/Windows, Up to 4 Apollos with Thunderbolt cascading connection, Design: 19"" / 1U, Includes external power supply and software bundle Rackmount Heritage Edition & Realtime Analog Classics Plus