The Apollo x4 offers a comprehensive monitor section with talkback functionality and dedicated front-panel controls for Alt Speakers, Dim, and Mono functions, as well as input and output metering capabilities. The interface also integrates seamlessly with LUNA, Universal Audio’s free Mac-based, single-window recording system with unlimited track counts and full Audio Units plug-in support. Mac and Windows drivers ensure compatibility with all major DAWs including Pro Tools, Logic Pro, Cubase, Ableton Live, and more. The included Console application provides control and recall of all interface and UAD plug-in settings including channel-strip presets, drag-and-drop functionality, and dynamically resizable windows. The plug-in bundle included with the Heritage Edition empowers you with 34 top-notch plug-ins ranging from vintage compressor and EQ collections to virtual guitar/bass amps, time-based processors, and tape emulation.

The built-in QUAD Core processing allows you to monitor and record audio using classic analog emulations with near-zero latency and no burden on your computer’s CPU. An optical output is also featured on the Apollo x4, allowing it to route up to eight channels from your DAW to a digital mixer, headphone distribution system, or external D/A converter.

In addition to the four primary analog inputs, you can record up to eight more channels by connecting external preamps with ADAT or S/PDIF optical outputs to the TOSLINK optical input port on the Apollo x4. Thanks to the switchable low-cut filter, pad, polarity inversion, 48V phantom power, and stereo linking on each analog input, you can efficiently optimize your incoming signals with straightforward buttons on the Apollo x4’s face. Impart vintage character of your choosing on microphone and instrument recordings while bypassing the unpredictable nature of old equipment. The interface features four XLR-1/4″ mic/line combo inputs and two 1/4″ Hi-Z inputs, all with Unison integration for precise UAD emulations of classic analog preamps. Furnished with elite-class 24-bit / 192 kHz conversion akin to the popular Apollo X rackmount interfaces, the Apollo x4 gives musicians, producers, songwriters, and audio engineers the appreciable value of crystal-clear, high-resolution recording and mixing with low distortion (-117 dB) and immense dynamic range (127 dB).

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