




Universal Audio Apollo X4 Heritage Edition Thunderbolt 3 Audio Interface with UAD Plug-Ins Overview:
Elite Audio Conversion and Four Unison Preamps, All on your Desktop.
Apollo x4 allows musicians and producers to easily track, overdub, and mix larger projects with elite-class A/D and D/A conversion, four Unison-enabled preamps, and QUAD Core realtime UAD plug-in processing all in a desktop Thunderbolt 3 audio interface for Mac and Windows.
Built upon UA’s 60-year heritage of audio craftsmanship, Apollo x4 confidently outperforms everything in its class, with 127 dB D/A dynamic range and an included bundle of UAD analog emulation plug-ins, giving you a fully-stocked analog studio, right on your desktop.
Four Unison Preamps: Get the Genuine Sound of Neve, Helios, API & More
Apollo x4 features four Unison-enabled mic preamps, letting you track through exacting mic preamp emulations from Neve, Helios, API, Manley, Universal Audio and many more. Exclusive to UA Audio Interfaces, Unison technology nails the tone of these sought-after tube and solid state mic pres including their input impedance, gain stage “sweet spots,” and the component-level circuit behaviors of the original hardware.
The secret to Unison is its hardware-software integration between Apollo’s mic preamps and its onboard UAD QUAD Core DSP Acceleration. Simply place a Unison preamp plug-in on your mic input in Apollo Console software, and it physically reconfigures the Apollo interface's impedance so you can tap into the classic sounds of the world’s most recorded mic preamps.
Expanded I/O and Built-in Talkback Mic:
In addition to its four onboard Unison-equipped preamps, Apollo x4 offers two headphone outs and two Hi-Z instrument inputs greatly enhancing your collaborative process. Plus, with a total of four line outs, optical ADAT/SPDIF input and output, plus dedicated monitor remote controls and a built-in Talkback mic, the 12 x 18 Apollo x4 can serve as the powerful centerpiece of your professional desktop studio.
Build a Networked Studio:
Users of any Thunderbolt-equipped Apollo interface can combine up to four Apollos and six total UAD-2 devices adding I/O and DSP as your studio grows. Once you expand your studio with an Apollo x6, x8, x8p, or x16 rackmount unit, you can use Apollo x4 as a desktop monitor control while still tapping its additional I/O and DSP power.
Key Features:
Included in Apollo "Heritage Edition" Bundle:
Featuring 10 premium UAD titles — including complete plug‑in Collections of our award-winning Teletronix, UA 1176, and Fairchild compressors, Helios Type 69 and UA 610 mic preamps, Pultec EQs, and more.
Included in the Realtime Analog Classics Bundle:
Apollo X Series System Requirements
ALL:
MAC:
PC:







