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Now supports Apollo Monitor Correction powered by Sonarworks®

Record hits with the world’s most powerful desktop audio interface.

Produce larger sessions with our most powerful desktop Apollo. Featuring highest-resolution audio conversion, four Unison™ mic preamps, and realtime UAD processing — letting you record through plug-ins from Neve, API, Manley, Auto-Tune, and hundreds more — Apollo x4 levels up your studio with legendary UA sound, built to inspire your next collaboration.

Produce music with elite-class Apollo X Gen 2 converters, and hear every detail with unprecedented dynamic range

Use four Unison preamps to get the tone and feel of iconic analog gear from Neve, API, Manley, Fender, and more

Record through UAD plug-ins in realtime with onboard QUAD Core DSP

Work faster with new UAD Console features including Auto-Gain, Plug-In Scenes, Monitor Controller, Immersive Audio, and more

Mix with confidence in any room or through headphones using Apollo Monitor Correction by Sonarworks®*

Get included UAD plug-ins from Auto-Tune, Fairchild, Teletronix, and more with Essentials+ or Studio+ Editions

4 Unison PreampsImpedance-matched analog modeling
Unison technology recreates the sound and feel of classic analog gear with digital control of mic preamp impedance and gain staging.
-120 dB THD+NStudio-grade D/A conversion
Apollo X Gen 2 converters let you record with unprecedented low noise and distortion (0.0001% THD+N).
129 dB DNRUltra low-noise recording
Enhanced Monitor D/A delivers the widest dynamic range of any Apollo interface to date.
2 Elite-Class HP OutsProfessional headphone monitoring
Clean, powerful headphone amplification delivers 124 dB DNR and -108 dB (0.0004%) THD+N into 300Ω.

Get Our Most Powerful Desktop Apollo

We built Apollo x4 to expand on the gold-standard Apollo Twin, the audio interface that single-handedly revolutionized home studio recording. With expanded I/O, elite-class 24-bit/192 kHz audio conversion, and the widest dynamic range to date, Apollo x4 puts the sound of the stars in reach for your next collaboration.

Record Through Iconic Preamps

Record Through Iconic Preamps

With four Unison™ preamps and dual front panel Hi‑Z instrument inputs, Apollo x4 lets you track through emulations of classic gear from Neve, Manley, API, Fender, and dozens more, giving you the rich analog textures used on the greatest recordings of our time.

Hear the Details Like Never Before

Hear the Details Like Never Before

Now in its Gen 2 design, Apollo x4 features our highest-resolution D/A converters ever. This enhanced monitoring, paired with features like Apollo Monitor Correction by Sonarworks,* means you’ll hear the most accurate representation of your recordings when mixing through monitors or headphones.

*Requires SoundID Reference software and compatible measurement microphone. Learn more at sonarworks.com



See What’s New in Gen 2

Learn about the next Generation of Apollo from top artists and influencers around the globe.



      Mix with Authentic Analog Sounds

      Out of the box, Apollo x4 gives you the tools used in the world’s biggest recording studios. Along with included LA-2A compressors, Pultec EQs, and amps from Marshall and Ampeg — you can tap into the entire library of over 200 UAD plug-ins to unlock proven hit-making sounds.





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      See plug-ins included with Essentials+

      Channel Strips & Preamps (6)
      Century Tube Channel Strip
      CS-1 Channel Strip
      Helios Type 69 Preamp & EQ
      Precision Channel Strip
      UA 610-A Preamp & EQ
      UA 610-B Preamp & EQ

      Compressors / Limiters (7)
      Fairchild 670 Legacy
      Teletronix LA-2A Classic Leveler
      Teletronix LA-2A Gray Classic Leveler
      Teletronix LA-2A Silver Classic Leveler
      Teletronix LA-2A Legacy Leveling Amplifier
      UA 1176LN Legacy
      UA 1176SE Legacy

      Equalizers (6)
      Helios Type 69 Legacy EQ
      Pultec EQP-1A Legacy EQ
      Pultec EQP-1A Passive EQ
      Pultec HLF-3C Passive EQ
      Pultec MEQ-5 Passive EQ
      Pultec Pro Legacy EQ

      Special Processing (4)
      Auto-Tune Realtime Access
      Oxide Tape Recorder
      Precision Enhancer Hz
      Verve Analog Machines Essentials

      Instruments (1)
      PolyMAX Polyphonic Synth

      Delay & Modulation (3)
      Galaxy Tape Echo
      Precision Delay Mod
      Precision Delay Mod L

      Reverbs & Rooms (3)
      Precision Reflection Engine
      Pure Plate Reverb
      RealVerb Pro Custom Room Modeler

      Guitar & Bass (3)
      Ampeg SVT-VR Classic Bass Amplifier
      Marshall Plexi Classic Amplifier
      Raw Distortion






      See plug-ins included with Studio+

      Channel Strips & Preamps (9)
      Avalon VT-737sp Channel Strip
      Century Tube Channel Strip
      CS-1 Channel Strip
      Helios Type 69 Preamp & EQ
      Manley Reference Microphone Preamp
      Precision Channel Strip
      UA 610-A Preamp & EQ
      UA 610-B Preamp & EQ
      V76 Preamplifier

      Compressors / Limiters (17)
      dbx 160 Compressor / Limiter
      Empirical Labs Distressor
      Fairchild 670 Legacy
      Fairchild 660 Compressor
      Fairchild 670 Compressor
      Teletronix LA-2A Classic Leveler
      Teletronix LA-2A Gray Classic Leveler
      Teletronix LA-2A Silver Classic Leveler
      Teletronix LA-2A Legacy Leveling Amplifier
      Teletronix LA-3A Classic Audio Leveler
      UA 1176 Rev A Classic Limiter
      UA 1176AE Classic Limiter
      UA 1176LN Rev E Classic Limiter
      UA 1176LN Legacy
      UA 1176SE Legacy
      UA 175B Classic Limiter
      UA 176 Classic Limiter

      Equalizers (6)
      Helios Type 69 Legacy EQ
      Pultec EQP-1A Legacy EQ
      Pultec EQP-1A Passive EQ
      Pultec HLF-3C Passive EQ
      Pultec MEQ-5 Passive EQ
      Pultec Pro Legacy EQ

      Special Processing (7)
      Auto-Tune Realtime Access
      Auto-Tune Realtime Advanced
      Auto-Tune Realtime X
      Oxide Tape Recorder
      Precision Enhancer Hz
      Studer A800 Multichannel Tape Recorder
      Verve Analog Machines Essentials

      Instruments (6)
      Electra 88 Vintage Keyboard Studio
      Moog Minimoog
      Opal Morphing Synth
      PolyMAX Polyphonic Synth
      Ravel Grand Piano
      Waterfall B3 Organ

      Delay & Modulation (6)
      Brigade Chorus Pedal
      Galaxy Tape Echo
      Precision Delay Mod
      Precision Delay Mod L
      Studio D Chorus
      Waterfall Rotary Speaker

      Reverbs & Rooms (4)
      Lexicon 224 Digital Reverb
      Precision Reflection Engine
      Pure Plate Reverb
      RealVerb Pro Custom Room Modeler

      Guitar & Bass (3)
      Ampeg SVT-VR Classic Bass Amplifier
      Marshall Plexi Classic Amplifier
      Raw Distortion


      Find Your Perfect Workflow

      Find Your Perfect Workflow

      Just like many pro studios, where an analog console is the heart of the workflow, Apollo x4 has a powerful mixing engine where you control plug-in routing and monitoring. And with the latest features like Auto-Gain, Bass Management, and Plug-In Scenes, it’s easy to find a flow that fits your needs.

      Learn more about UAD Console ›

      A Hybrid System for Your Mission

      A Hybrid System for Your Mission

      Combine Apollo x4’s DSP processing with native processing from your computer to produce large sessions with complex plug-in chains — a powerhouse hybrid workflow that outpaces any native-only recording setup.

      Expand Your Studio as You Grow

      Build out your dream studio by linking up to four Thunderbolt Apollo interfaces for up to 128 channels of premium I/O, and control it all from your desktop using Apollo x4. So no matter how far your music takes you, an Apollo will always be in reach.**


      12 x 18 Thunderbolt 3 audio interface with QUAD Core DSP plug-in processing

      Four Unison™ mic preamps, two Hi-Z instrument inputs, optical Toslink I/O (ADAT or S/PDIF)

      Two 1/4" monitor outs, four 1/4" line outs (ALT 1 / 2), two 1/4" TRS headphone outs

      Elite-class Apollo X Gen 2 converters with 24-bit / 192 kHz resolution

      Enhanced D/A for critical monitoring and playback with 129 dB dynamic range

      Calibrate your main monitor and headphone outputs with Apollo Monitor Correction powered by Sonarworks®*

      Fully-featured monitor controller with alternate speaker switching and integrated talkback for easy communication with talent

      Updated UAD Console app featuring Auto-Gain, Plug-In Scenes, subwoofer integration with Bass Management, immersive audio support, and more

      Onboard DSP supports over 200 UAD plug-ins via VST, AU, and AAX 64 formats in all major DAWs

      Includes up to 50+ UAD plug-ins with Essentials+ or Studio+ Editions

      Compatible with LUNA, Logic Pro, Pro Tools, Cubase, Ableton Live, and more**

      Expandable with Thunderbolt Apollo interfaces or select models over Dante

      Free industry-leading technical support from knowledgeable audio engineers


      *Requires SoundID Reference software and compatible measurement microphone. Learn more at sonarworks.com
      **For full compatibility information, refer to help.uaudio.com

      Customer Reviews

      Apollo x4

      Overall Rating

      5/5
      (2)

      r. Mercurio

      December 6, 2024

      Killer

      Killer…..

      F. Kuncewicz

      November 6, 2024

      a travel card

      best features for travel card (4 pres 2 headphones and bad ecosystem)
      the direct to converter is also nice
      the sound is good to.
      they should make some loyalty program for uses but its marketing not hardware review)