Apollo x4 Hardware Manual Introduction 7
Apollo x4 Features
Key Features
• Best in class audio quality with improved 24-bit/192 kHz conversion
• Realtime UAD Processing — monitor and track through vintage compressors, EQs,
tape machines, and guitar amp/pedal plug-ins with near-zero latency
• Four premium mic/line preamps; four line outs; two front-panel Hi-Z instrument
inputs, and two stereo headphone outputs
• Unison
™
technology for stunning models of classic mic preamps and guitar amps
• Built-in talkback microphone for communication and recording
• Monitor remote functions can replace dedicated monitor controllers
• UAD-2 QUAD DSP processing onboard
• Thunderbolt 3 connection for blazing-fast PCIe speed on modern computers
• Uncompromising analog design, superior components, and premium build quality
throughout
• Cascade up to four Thunderbolt-equipped Apollos and six total UAD-2 devices —
adding I/O and DSP as needed
All Features
Audio Interface
• Sample rates up to 192 kHz at 24-bit word length (96 kHz max on S/PDIF I/O)
• Up to 12 x 18 simultaneous input/output channels
• Four channels of analog-to-digital conversion via:
• Four balanced mic/line inputs
• Two Hi-Z instrument inputs
• 10 channels of digital-to-analog conversion via:
• Stereo monitor outputs
• Two stereo headphone outputs
• Four line outputs
• Up to eight channels of digital optical inputs and outputs via:
• Eight channels ADAT optical with S/MUX for high sample rates, or
• Two channels S/PDIF optical with sample rate conversion
Microphone Preamplifiers
• Four high-resolution, ultra-transparent, digitally-controlled analog mic preamps
• Unison
™
technology for exacting emulations with Unison-enabled UAD plug-ins
• Front panel and software control of all preamp parameters
• Low cut filter, 48V phantom power, 20 dB pad, polarity inversion, and stereo
linking
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