Apollo x4 Heritage Edition Universal Audio
Audio Interfaces

The Universal Audio Apollo x4 Heritage Edition is a premium Thunderbolt 3 audio interface with 12 inputs, 18 outputs, 4 Unison mic preamps, and a UAD QUAD Core processor. It includes a $2,400 UAD plug-in suite that provides real-time modeling of classic preamps. Compatible with Mac and Windows (Thunderbolt 3 required), this interface is ideal for audio professionals.

ARTICLE N° 74867
  • Universal Audio Apollo x4 Heritage Edition
  • Special edition of UA’s highly acclaimed Apollo x4 interface with a premium suite of 10 plug-in collections
  • Thunderbolt 3 Audio Interface
  • 12 Inputs and 18 Outputs (Analog + Digital)
  • Desktop format
  • Mac and Windows compatible (ONLY on PCs with Thunderbolt 3 on their motherboard)
  • Apollo X-derived A/D and D/A converters
  • Exceptional 127 dB dynamic range
  • Extremely low total harmonic distortion + noise (< 117 dB)
  • 4x Unison™ mic preamps
  • Models classic tube and solid-state guitar amps and mic preamps
  • UAD QUAD Core processor
  • 2x Unison Hi-Z front-panel instrument inputs
  • 2x independent front-panel headphone outputs
  • Built-in talkback mic for communicate with artists in the booth
  • Dedicated monitoring including remote control of speaker volume and Mono, Mute, DIM and ALT functions
  • Up to 8 additional digital channels via ADAT and S/PDIF optical inputs and outputs
  • Allows UAD Plug-Ins in VST, AU, RTAS and AAX 64 formats to be run in most software digital audio sequencers
  • Includes the LUNA studio app: a fully integrated recording software designed for Apollo (available for Mac today, development for Windows in progress)
The Universal Audio Apollo x4 Heritage Edition is a special edition of the popular Apollo x4 interface, featuring a premium suite of 10 UAD plug-in collections. This Thunderbolt 3 audio interface is designed for audio professionals who demand exceptional sound quality and maximum flexibility for studio recording and mixing.

With 12 inputs and 18 outputs, the Apollo x4 Heritage Edition can handle complex setups, including both analog and digital inputs. Its compatibility with Mac and Windows (for Thunderbolt 3-equipped PCs only) ensures seamless integration into any production environment. The Apollo X-derived A/D and D/A converters guarantee an exceptional dynamic range of 127 dB and an extremely low harmonic distortion + noise ratio (< 117 dB).

The Apollo x4 features 4 Unison™ mic preamps, allowing you to enjoy classic tube and solid-state guitar amp and mic preamp modeling in real time. The UAD QUAD Core processor provides enough processing power to run UAD-2 VST, AU, RTAS, and AAX 64 plug-ins in most DAWs.

On the front panel, you’ll find 2 Unison Hi-Z instrument inputs and 2 independent headphone outputs, making monitoring and recording easy. The built-in talkback mic makes it easy to communicate with performers in the booth, while dedicated monitoring includes speaker volume, Mono, Mute, DIM, and ALT controls.

For maximum expandability, the Apollo x4 offers up to 8 additional digital channels via ADAT and S/PDIF optical inputs and outputs. Included with this interface, the LUNA studio application, a fully integrated recording software designed for Apollo (available for Mac, development for Windows in progress), allows for an even more enriching production experience.

The Heritage Edition is distinguished by a set of high-quality UAD plug-ins worth €2400, including emulations of Neve, Helios, API, Manley, UA mic preamps, and many others, allowing you to benefit from the best of analog audio in real time. The Universal Audio Apollo x4 Heritage Edition is an essential tool for any professional studio looking to achieve unparalleled sound quality.

Be sure to check the compatibility of your computer, whether Mac or PC, it must be equipped with a Thunderbolt 3 port. Note that this interface is backward compatible with Thunderbolt 2 via the Apple adapter (not supplied), and that a Thunderbolt 3 cable is also required (not supplied).
Computer connection
 Thunderbolt 3
Desktop
 Yes
Maximum resolution
 24 bit
Max sampling frequency
 192
Compatibility
 MacOS, Windows
Micro input
 4
Phantom power
 Yes
Instrument input
 Yes
Line input
 4
Digital input
 ADAT, S/PDIF Optical
Line output
 6
Headphone output
 2
Digital output
 Adat, S/PDIF Optical
Effects
 DSP effects
Software incl.
 Musical Soft
Power supply
 Power adapter (included)
Warning:
- Optional Thunderbolt 3 (USB-C) cable
- Thunderbolt 3 and USB-C ports share the same connectivity, but a USB-C port (no lightning bolt logo above) will not be compatible with this interface
- the Thunderbolt port
- WARNING: Windows compatibility is only valid with PCs equipped with Thunderbolt 3 (or 2) ports present by default on your motherboard. If your PC has this type of port following the addition of a daughter card placed on a PCIe slot in the tower, it will not work.

Exclusive to Universal Audio, Unison technology offers a proprietary hardware/software integration that accurately reproduces the sound of these legendary tube and transistor mic preamps — including their input impedance, the "sweet spots" of their gain stages and the behavior of the circuits of the original models. You’ll also find Unison technology on the Hi-Z instrument input on the front of the Apollo Twin X; it adapts the impedance and gain when you use guitar and bass amp models from Fender, Marshall, Ampeg, and more.

LUNA Recording System — Complete Integration with Apollo for Fast and Intuitive Work
All Apollo X series interfaces work with leading Digital Audio Workstations (DAWs), including Logic Pro, Ableton Live, and Pro Tools. But they become fully integrated recording systems with LUNA, a powerful application from Universal Audio available on the Mac. With its Accelerated Realtime Monitoring™ technology, LUNA lets you record and mix in a single, highly intuitive interface with unlimited tracks, full support for AU plug-ins, and access to an exclusive suite of LUNA Instruments and Extensions.

*The Apollo x4 Heritage Edition includes 10 premium UAD plug-in collections and the UAD Realtime Analog Classics Plus plug-in bundle. All other UAD plug-ins are sold separately at www.uaudio.com. All trademarks are the property of their respective owners. - Included in the “Heritage Edition” Bundle supplied with the Apollo: - UA 1176 Classic Limiter Collection - Teletronix LA-2A Classic Leveler Collection - Pultec Passive EQ Collection - Fairchild Tube Limiter Collection - Teletronix LA-3A Audio Leveler - UA 610 Tube Preamp & EQ Collection - Helios Type 69 Preamp & EQ Collection - V76 Preamplifier - Oxide Tape Recorder - Pure Plate Reverb - included in the Realtime Analog Classics Bundle: - UA 610-B Tube Preamp & EQ - UA 1176LN Limiting Amplifier (Legacy) - UA 1176SE Limiting Amplifier (Legacy) - Pultec EQP-1A EQ (Legacy) - Pultec Pro EQ (Legacy) - Marshall® Plexi Classic Guitar Amp - Fairchild 670 Compressor (Legacy) - Teletronix LA-2A Leveling Amplifier (Legacy) - Raw Distortion - Ampeg® SVT-VR Classic Bass Amp - Precision Channel Strip (Precision Mix Rack Collection) - Precision Reflection Engine (Precision Mix Rack Collection) - Precision Delay Mod (Precision Mix Rack Collection) - Precision Delay Mod L (Precision Mix Rack Collection) - RealVerb Pro Custom Room Modeler - Precision Enhancer Hz

Spotlight on

For over 50 years, Universal Audio has been an industry leader in DSP audio modeling and vintage analog technology. The American manufacturer has released groundbreaking products such as the LA-2A compressor and the 610 tube mic preamp which have been used to record artists as diverse as the Beach Boys and Van Halen. 
Since the 2000s, Universal Audio has been faithfully reproducing classic analog recording equipment and designing new digital recording tools in keeping with the sound and spirit of vintage analog technology. Best-sellers include the Apollo interface, UAD-2 Satellite, UAD plug-ins, UADFX pedals and the OX Amp Top Box.