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Produce bigger pro sessions from your desktop, in realtime.

Apollo x4 gives engineers and producers recording larger projects the same professional analog tones heard on your favorite records with four onboard Unison mic preamps. With elite‑class conversion and QUAD Core UAD plug-in processing, Apollo x4 lets you record through preamps from Neve, API, Manley, SSL, and more — with near‑zero latency — giving you a fully-stocked analog studio, right on your desktop.

Experience elite-class Apollo sound — as heard on hundreds of hit records

Record your vocals and synths in realtime through classic mic preamp emulations from Neve, API, Manley, Avalon, and more

Link up to four Apollos for 156 channels of premium I/O and control it from your Apollo x4

Create with seamless hardware-software integration and analog console modeling in LUNA Recording System

Hear Every Detail in your Recordings

Apollo x4 improves upon the original Apollo Twin’s gold‑standard audio quality with completely redesigned A/D and D/A conversion — giving you increased dynamic range and ultra‑low THD. This elite‑class conversion gives you a spacious, organic sound that easily rivals dedicated high‑end converters.

Record Synths and Vocals through Iconic Preamps

With its four Unison preamps and dual front panel Hi‑Z instrument inputs, Apollo x4 lets you track in realtime through preamp and channel strip plug-ins from Neve, Manley, API, and dozens more, giving you the same rich analog texture as the hardware used on decades of iconic music.*

Get the Pro Sounds of Analog Hardware, Right on your Desktop

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Out of the box, Apollo x4's included plug-ins give you album-ready tones in realtime with professional tools like the UA 610-B Tube Preamp & EQ, Teletronix LA‑2A tube compressor, amps from Marshall and Ampeg, and more. Plus, Apollo x4 lets you tap into the entire UAD plug-in library, giving you the proven hit-making sounds of Ocean Way Studios, Capitol Chambers, and hundreds more.

See Included Plug-Ins ›
Learn about Heritage Edition Plug‑Ins ›  

Enjoy a Fast, Natural Workflow with LUNA

Apollo x4 works with all major DAWs, but only LUNA Recording System gives you seamless integration with Apollo, for big analog studio sound — in realtime — using a host of built-in features and extensions from API console modeling to genuine Neve summing and integrated Studer tape.

Learn more about LUNA ›

Your New Analog Studio, Expanded

Link up to four Apollos for 156 channels of premium I/O as your studio grows — and control it all from your desktop using Apollo x4.

UAD Plug-Ins vs. Analog Hardware

Watch Grammy-award winning producer Jacquire King (Tom Waits, Kings of Leon) put UAD plug‑ins to the test in a live session featuring electronic-soul artist Jamie Lidell.

Compare Apollo Models

Desktop 12 x 18 Thunderbolt 3 audio interface for Mac and Windows with elite A/D and D/A conversion inherited directly from the acclaimed Apollo X rackmount interfaces (backwards compatible with Thunderbolt 1 & 2 on Mac)

4 Unison mic preamps offer stunning models of classic tube and transformer-based mic preamps and guitar amps

Produce with LUNA Recording System — a fully-integrated recording application for Apollo (Mac/Thunderbolt)

UAD-2 QUAD Core Processing for tracking through vintage compressors, EQs, tape machines, mic preamps, and guitar amp plug-ins with near-zero latency, regardless of audio buffer size

Combine up to 4 Thunderbolt-equipped Apollos and 6 total UAD devices

2 Unison-enabled Hi-Z instrument inputs

2 independent headphone outputs

Built-in Talkback mic for communication with studio talent and recording slate cues

Includes monitor remote functions and Mono, Mute, DIM, and ALT monitor controls

Up to 8 channels of additional digital input and output via optical ADAT or S/PDIF

Includes the "Realtime Analog Classics Plus" UAD plug-in bundle featuring the Teletronix LA-2A, 1176, and Fairchild 670 compressors, Pultec EQs, UA 610-B Tube Preamp & EQ, and more.*

Runs UAD Powered Plug-Ins via VST, Audio Units, and AAX in all major DAWs

Uncompromising analog design, superior components, and premium build quality

Free, industry-leading technical support — on the phone and online — from knowledgeable audio engineers

User Manual

Download User Manual

For system requirements, go here.

Apollo x4 includes the “Realtime Analog Classics Plus” UAD plug-in bundle. Other UAD plug-ins sold separately at All trademarks are property of their respective owners.

Realtime Analog Classics Plus Bundle

With the Realtime Analog Classics Plus plug-in bundle, you not only get legendary compressors such as the Fairchild® 670 and EQs like the Pultec® EQP-1A, but also stunning guitar and bass amp emulations from Softube, and UA’s landmark 610-B Tube Preamp and EQ plug-in.

  • UA 610‐B
  • Marshall Plexi Classic Amplifier
  • Fairchild 670 Legacy
  • Teletronix LA‐2A Legacy
  • UA 1176LN Legacy
  • UA 1176SE Legacy
  • Pultec EQP‐1A Legacy
  • Pultec Pro Legacy
  • Ampeg® SVT-VR Classic Bass Amp
  • Precision Channel Strip
  • Precision Reflection Engine
  • Precision Delay Modulation
  • Precision Delay Modulation L
  • UA Precision Enhancer Hz
  • Raw Distortion
  • RealVerb‐Pro

UA 610-B Tube Preamp and EQ

UA 610-B Tube Preamp and EQ

Impart your tracks with the iconic warmth and character of the classic hardware used to track everyone from Duke Ellington to Coldplay. By emulating the entire signal path, including tube amplifiers, transformers, and circuit nonlinearities, the 610-B Tube Preamp and EQ plug-in injects organic detail and saturation to any signal — whether you’re re-amping or tracking through the 610-B via Universal Audio’s Unison™ technology.

Marshall<sup>®</sup> Plexi Classic Amplifier

Marshall® Plexi Classic Amplifier

The undisputed alpha dog of rock and roll guitar amps, the Marshall “plexi” amplifier is as legendary as the music it helped create. From Jimi Hendrix to Jimmy Page, Duane Allman to Eric Clapton, the Plexi’s punishing melange of snarl, sustain, smoothness, and raunch defined the sound of rock. Developed by Softube, the Marshall Plexi Classic Amp plug-in gives you the sound of this iconic amp with a perfectly placed microphone from engineer Tony Platt who recorded AC/DC’s Back in Black and Highway to Hell.

Fairchild<sup>®</sup> 670 (Legacy)

Fairchild® 670 (Legacy)

The world’s most coveted compressor, the classic Fairchild 670 tube limiter will give your tracks and mixes unmistakable tube warmth and character. Whether you’re looking for subtle compression on a lead vocal, or grittier textures that can work on guitars, bass, or a drum bus, the Fairchild 670 plug-in adds a classic “glow” to anything you run through it.

Teletronix<sup>®</sup> LA-2A Classic Leveling Amplifier (Legacy)

Teletronix® LA-2A Classic Leveling Amplifier (Legacy)

With its gentle, program dependent optical compression and meticulously designed tube amplifier, the LA-2A is the go-to compressor for professional mixers around the world — especially for vocals. Incredibly easy-to-use Peak Reduction and Gain controls gives you the ideal optical compression sound for guitar, bass, drums, and more.

1176SE/LN<sup>®</sup> Classic Limiting Amplifiers (Legacy)

1176SE/LN® Classic Limiting Amplifiers (Legacy)

Get classic, ultra-fast FET compression from the world’s most recognized compressor. The 1176 will impart punch, presence, and character as well as its signature distortion overtones on drums, vocals, guitars, and bass. The 1176LN has graced countless recordings, from Led Zeppelin, to the White Stripes and Michael Jackson.

Pultec<sup>®</sup> Pro Equalizers (Legacy)

Pultec® Pro Equalizers (Legacy)

Mix with two of the most sought-after hardware EQs ever made — the MEQ-5 Midrange Equalizer and the EQP-1A Program Equalizer. Both of these tube-based icons deliver smooth and silky EQ curves with an abundance of warm analog character.

Ampeg<sup>®</sup> SVT-VR Classic Bass Amp

Ampeg® SVT-VR Classic Bass Amp

Introduced in 1969, the Ampeg SVT bass amp is still the reigning king of high-powered tube bass tone. Developed by Brainworx, the Ampeg SVT-VR Classic Bass Amp plug-in perfectly captures the raw power and punch that has made this the go-to amp for rock, funk, and soul players. Track in real time using Unison™ preamp technology for the tone, touch, and feel of a real SVT bass amp, or transform bland DI tracks with the thunderous roar of a stone cold classic.

Precision Mix Rack Collection

Precision Mix Rack Collection

Featuring the Precision Channel Strip, Precision Reflection Engine, and Precision Delay Modulation plug-ins, the Precision Mix Rack Collection offers four modern, high-fidelity plug-ins for recording and mixing. Powerful and intuitive, Precision Mix Rack Collection gives you an impressive tool set — perfect for beginners and seasoned professionals alike.

UA Precision Enhancer Hz

UA Precision Enhancer Hz

Expertly dial-in your music’s low-end frequencies with the Precision Enhancer Hz plug-in. Able to yield exacting results with minimal adjustment, the Precision Enhancer Hz can add weight to kick drum samples, fatten up a synth bass, or simply make the low-end of your tracks more audible on smaller speakers.

Raw Distortion

Raw Distortion

Modeled from a vintage early-’80s Pro Co Rat, Raw Distortion delivers all the gritty dynamic raunch of the legendary stompbox. And with Unison™ technology, you can plug in to Apollo Twin, 8, or 8p’s front-panel Hi-Z instrument jack and experience the same circuit interaction, gain range, and clip points for the true tone, feel, and response of the original hardware.

RealVerb Pro

RealVerb Pro

RealVerb Pro is a flexible, natural sounding reverb based on UA’s own unique set of algorithms. Allowing you to design the room just as you hear it, the RealVerb Pro goes beyond simply big/small or dark/bright, giving your sources distortion-free, smoothing diffusion control and ultra-long reverb tail.

Customer Reviews

Apollo x4

Overall Rating


J. Pedraza

November 26, 2023

It’s what I needed

The X4 is amazing. I love Universal Audio and everything they have been doing. This has leveled up my productions and live sound.

j. tansin

October 13, 2023


Randomly crashes, plug ins are so cpu demanding you can buy all the satellites your desk can fit and you'd still run out of cpu. Outside of that its great!

L. Jefferies

October 2, 2023

High Quality

Sounds, looks and feels like quality.

C. Achilli

October 2, 2023

Excellent product

I came from Audient id44 and was looking for something more professional that would meet my needs for recording and mixing. It all started with UAD's DAW, Luna, Which really changed my approach to music. Coming from Logic and Studio One I thought DAWs eventually, they all sounded the same. With Luna I can pretty much always get what I want, with disarming ease and speed. So the Apollo x4 was an organic consequence, between what I wanted and what I expected. Well, it was the best choice. Apart from the fact that the headphone outputs are very powerful (in the iD44 I had to connect an amp) the ease of use goes hand in hand with the aesthetics. The Unison preamps are pure unparalleled magic. The built-in talkback is a treat, the expandability of the interface is in keeping with the type of product purchased (portable but wanting static).
I miss perhaps a bit the button that changed the output to mono against phase, but I can do without it given the countless positives of the X4.
Thank you Universal Audio for giving us these magical products, marriages may have stopped working but with the Apollo's it's love till the end.

L. Jefferies

October 1, 2023

Clean Quality

In very happy with my purchase. I'll link it to my x8 & x16

c. rosario

September 25, 2023

Just Love it

Upgraded from the twin
Love it for mobility, more inputs and outs

Sturdy well-made
And it packs a punch

Kudos to UAD

B. Williams

September 25, 2023

Real Nice

I love this thing. I can take it with me and a Macbook pro and have a great studio anywhere.

A. Diomidov

August 31, 2023

It’s the greatest sound ever I hear!!! Make you sound warm!

It’s the greatest sound ever I hear!!! Make you sound warm! You really can make warm analog sound, no other interfaces can do it. You can record your material in different styles. You can manage all the settings very easily. At the moment, this is the best audio interface, with a huge set of professional, and really working plug-ins.

F. Soto

August 17, 2023

Apollo X4 he best desktop ever!

I needed to upgrade my interface for recording guitars, I have a great arsenal of guitars and amps but I was not satisfied with the recording sounds I was getting. The moment I plugged the headphones in the Apollo I could tell right away this is the real deal. I am in love with the heritage bundle, everything I dreamed of having in my home studio, elegant, minimalist and I love LUNA , my only regret was not making the switch to Apollo earlier. Thank you UA!


August 8, 2023

Apollo x4 is a beast!!!

This is a must for your desktop!!

Z. Gaubas

July 10, 2023

Apollo x4

The sound quality is fantastic, super preamps, sounds very good when using plugins with unison. I was choosing between RME and UAD and chose Apollo. Works great with my Macbook Air M1. Of course, this interface is not cheap, so I would have liked a thunderbolt 3 cable to be added to the package. Overall, I am satisfied with my purchase, I really recommend this interface.

A. Mäkelä

June 27, 2023

A compact box of near perfection

The Apollo x4 is such an amazing audio interface. My instruments seem to have been brought to life through the unison preamps and amps. And when it comes to the UAD plug-in gallery most of it is amazing albeit quite a few of them are showing their age. I do have some gripes though. The interface seems to somewhat amplify the buzz and other noises coming from my pickups or from the wall socket. My previous interface didn’t do this but I think it might be an ok trade off for better sound and since I can alleviate the problem with the C-Axe plugin all tends to be well. But I have to try and make all the noise go away since the Apollo seems to push it in my face a lot. Also it has to be said that I don’t think it’s cool that you have to have an internet connection all the time to basically use the best features of Apollo. But other than that I can’t seem to find anything else to complain about. I really do believe this purchase has and will up my game remarkably. I am using the interface with a Mac so Luna just brings out the best of the unit as well. Really satisfied with my purchase.

F. Denaro

June 10, 2023


I use it on windows and for my needs it do everything! i just buyed motherboard with thunderbolt and happy!

D. Sprogis

May 15, 2023

Totally Blown Away by the Apollo X4

Very impressive sound quality. Makes mixing so much easier with very accurate sound pressure reproduction. Love it!

P. Bartušek

May 1, 2023

Apollo x4

It is the best device in its class.

c. de smet

April 17, 2023

Best purchase ever!

Always had other interfaces for many years , finally updated to the apollo X4 and best choice i ever made !

L. Dozier

March 18, 2023

The Apollo x4 Rocks!!!

The x4 is the best 4 channel portable audio interface on the market! This is my second x4 and I love the fact of having 4 unison mic preamps for plugging up audio equipment quickly like microphones and keyboards without having to go behind rack gear.

J. Tillman

March 17, 2023

Best purchase I’ve made in years.

This is a great desktop investment for anyone who is looking to take their recording/mixing to the next level. So far, I am very impressed with Unison and love the workflow. All in all, the Apollo x4 sounds amazing and really feels like a big step up. I couldn’t be happier!

M. Racanelli

February 19, 2023

Excellent Audio Interface

This device is fantastic. Being able to have unison plugins and processing directly on the device for zero latency track recording is amazing! Having multiple inputs is an absolute plus but you cant go wrong with any of the hardware options!


February 14, 2023


Perfect interface for a home studio. Quality plugins, superior sound and very expandable. Last interface I’ll ever need for my home setup! THANK YOU UNIVERSAL AUDIO