24-in / 28-out USB audio interface with eight preamps and cutting-edge 32-bit / 192 kHz audio conversion Vintage Mic Preamp mode on every channel for recording your voice, guitar, synths, or band with the rich, full sound of an iconic UA 610 tube preamp UA 76 Compressors on every channel to add clarity and punch to vocals, drums, instruments, and other sources with analog circuit based on the renowned 1176 Digitally-controlled mic preamps with Assistive Auto-Gain and full session recall with UAD Console app and LUNA Digital Audio Workstation 16-in / 16-out ADAT connectivity for digital expansion and linking of up to three Volt 876 interfaces to form the ultimate 24 x 28 recording system Standalone ADAT mode to connect Volt 876 to third-party interfaces or Apollo over ADAT as an 8 x 8 I/O preamp expander Onboard talkback microphone for effortless studio communication Realtime direct monitoring with dedicated front panel controls, plus two stereo low-latency cue mixes when used with UAD Console or LUNA DAW Class-compliant for hassle-free set-up with Mac, iPad, and iPhone Windows systems require the ASIO driver, available within the UA Connect app Two studio-quality headphone amplifiers for loud, clear monitoring and effortless collaboration 48V phantom power for condenser microphones (selectable per channel) Stylish, rugged construction built to withstand years of use, with included rack ears and rubber feet for desktop or 1U rack mounting options