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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

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.

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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

Apollo x4 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

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

N. Flores

February 5, 2023


This unit is literally incredible. Especially if you are invested into the UA ecosystem as I like to call it. Console, luna make TRACKING through analog a perfectly seemless experience. NOW HERE'S MY ONE AND ONLY COMPLAINT ! contacting UA for support over the years has become progressively worse. In the event something goes wrong just know they will make you wait and I mean wait. I'm currently going on a month now. I'm waiting on an RA# that's all just the number that's not including sending the unit in for repair and waiting for its return.
Other then that if you have patience this is the #1 interface on the planet. Other may debate due to the price point but trust you are paying for a brand that creates quality and innovates. LUNA WILL BECOME INDUSTRY STANDARD SURPASSING PROTOOLS SOON ENOUGH. I SAID IT FIRST.

p. je rak

February 1, 2023

good sound balance

good sound balance than silver apollo 8.
talkback mic option is good for small studio.
next model more powerful mic preamp
i want.
no problem with old macbook pro.
adapter connect jack perfect.

T. Arsenyan

January 27, 2023

T. Arsenyan

Es de maravilla es un producto increíble

M. Dimoulas

January 22, 2023

So glad I purchased this!

First off the Apollo x4 is a great piece of hardware. I previously owned an apogee Quartet. it was very nice, however the Apollo interface software and sound I find much better and easier to use. The company has so much learning resources which I'm very impressed. The only thing I would like to see is the Console interface text & plugins being able to enlarge to accommodate my 43" monitor screen.
Well Done Universal Audio!


January 20, 2023

It's expensive, but I'm glad I installed it

I am grateful that UAD-2 plug-ins can be used with NUENDO and Logic. As a bonus, I discovered that it works in Premiere Pro too!

However, although I can input 4ch input to the DAW, there is no sound on the monitor or headphones!

Insufficient explanation about routing.

B. Lackner

January 19, 2023

Fantastic Device

I recently got the Apollo x4 and I am more than happy with it. Great sounding interface and a good amount of DSP.

R. Guillaume

January 12, 2023

Apollo X4 Thunderbolt

Excellente interface audio ! En remplacement de ma RME Fireface 800 , Elle est encore bien meilleure avec très faible latence sur mon mac mini ! En ce qui concerne les effets plugin UAD , J'ai un meilleur rendu par rapport à tout ce qui existe sur le marché !! Je suis très heureux de faire partie de la famille Universal Audio !

Z. Jackson

January 11, 2023


Been meaning to upgrade for a while, and so happy I did. Game changer!

M. Diaz Velez

January 11, 2023

Amazing interface

Clean preamps, great power and nice design.

R. Bán

December 23, 2022

Róbert Forever UAF

Thank You UAD.

E. Brooke

December 23, 2022

Singer song writer

I wanted to record myself live with 3 mics. Very pleased with this choice. The unison Preamps are superb and when plugging on top a neve preamp. Wow

J. West-Oram

December 17, 2022

Excellent Desktop Interface

Just upgraded from Apollo Twin to Apollo x4 and the improvement has gone way beyond my expectations. The Twin has been great (5 years use) but there is so much more I can achieve now with the x4. Setting up was a piece of cake. A wise buy!

J. West-Oram

December 17, 2022

Excellent Desktop Interface

Just upgraded from Apollo Twin to Apollo x4 and the improvement has gone way beyond my expectations. The Twin has been great (5 years use) but there is so much more I can achieve now with the x4. Setting up was a piece of cake. A wise buy!