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Desktop 12 x 18 Thunderbolt audio interface with four Unison mic preamps, elite-class Apollo X Gen 2 audio conversion, Auto-Gain, Apollo Monitor Correction, Bass Management, QUAD core DSP plug-in processing, and premium software suite for Mac or Windows.
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, and hundreds more — Apollo x4 levels up your studio with legendary UA sound, built to inspire your next collaboration.
The Gold Standard, on Your Desktop
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.
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.
Unlock Authentic Analog Sounds
Right out of the box, Apollo X4 gives you the plug-ins used by the world’s best engineers. Get legendary Teletronix LA-2A and 1176 compressors, UA 610, Century, and LA-6176 tube channel strips, plus UAD guitar amps like Showtime ’64 and Lion ’68. Choose from a selection of upgrade bundles to tap into the entire UAD library of over 200 titles to unlock proven hit-making sounds.
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 atsonarworks.com.
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.
A Hybrid System for Your Mission
Combine Apollo x4’s QUAD Core 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.**
Key Features
12 x 18 Thunderbolt 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 80+ UAD plug-ins with UAD Analog Classics or UAD Analog Classics Pro
Add even more with optional upgrade bundles like the UAD Unison Preamp Collection, UAD Ultimate, or UAD Complete
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 Apollo Monitor Correction Add-on and SoundID Reference licenses, available from sonarworks.com
**For full compatibility information, refer to help.uaudio.com
Over 80 Included Plug-Ins in UAD Analog Classics Pro
Vocals & Pitch Correction (2)
Topline Vocal Suite
Topline Key Finder
Channel Strips & Preamps (19)
API® Preamp
API® Vision Channel Strip
API® Vision Channel Strip Legacy
Avalon® VT-737sp Channel Strip
CS-1 Channel Strip
Century Tube Channel Strip
Helios® Type 69 Preamp & EQ
LA-6176 Signature Channel Strip
Manley® Reference Microphone Preamp
Manley® VOXBOX Channel Strip
Neve® 1073 Preamp & EQ
Neve® 88RS Channel Strip
Neve® 88RS Channel Strip Legacy
Precision Channel Strip
SSL® E Series Channel Strip
SSL® E Series Channel Strip Legacy
UA 610-A Preamp & EQ
UA 610-B Preamp & EQ
V76 Preamplifier
Compressors / Limiters (21)
API® 2500 Stereo Bus Compressor
dbx® 160 Compressor / Limiter
Empirical Labs EL8 Distressor
Fairchild 660 Compressor
Fairchild 670 Compressor
Fairchild 670 Legacy Compressor
Precision Buss Compressor
SSL® G Series Bus Compressor
SSL® G Series Bus Compressor Legacy
Teletronix LA-2 Classic Leveler
Teletronix LA-2A Gray Classic Leveler
Teletronix LA-2A Silver Classic Leveler
Teletronix LA-2A Legacy
Teletronix LA-2A Tube Compressor
Teletronix LA-3A Classic Audio Leveler
UA 1176 FET Compressor
UA 1176 Rev A Classic Limiter
UA 1176AE Classic Limiter
UA 1176LN Rev E Classic Limiter
UA 1176LN Legacy
UA 1176SE Legacy
Equalizers (9)
Helios Type 69 Legacy EQ
Neve® 1073 Legacy
Neve® 1073SE Legacy
Precision Equalizer
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 (9)
A-Type Multiband Dynamic Enhancer
Ampex® ATR-102 Mastering Tape Recorder
Little Labs® Voice Of God Bass Resonance
Oxide Tape Recorder
Precision De-Esser
Precision Enhancer Hz
Precision Enhancer kHz
Studer® A800 Multichannel Tape Recorder
Vibe Analog Machines Essentials
Instruments (1)
PolyMAX Polyphonic Synth
Delay & Modulation (8)
Brigade Chorus Pedal
Cooper® Time Cube MkII Delay
EP-34 Tape Echo
Galaxy Tape Echo
KORG® SDD-3000 Digital Delay
Precision Delay Mod
Precision Delay Mod L
Studio D Chorus
Reverbs & Rooms (6)
Lexicon® 224 Digital Reverb
Ocean Way Studios Deluxe
Ocean Way Studios
Precision Reflection Engine
Pure Plate Reverb
UAD Sound City Studios
Mastering (3)
Precision Limiter
Precision Maximizer
Precision Multiband
Guitar & Bass (9)
Bermuda Triangle
Fender® ’55 Tweed Deluxe
Raw Distortion
TS Overdrive Pedal
UAD Dream ’65 Reverb Amplifier
UAD Lion ’68 Super Lead Amp
UAD Ruby ’63 Top Boost Amplifier
UAD Showtime ’64 Tube Amp
UAD Woodrow ’55 Instrument Amplifier
LUNA Extensions (4)
Ampex® ATR-102 Master Tape Extension
API® Summing Extension
API® Vision Console Emulation
Studer® A800 Multitrack Tape Extension
