Desktop QUAD Core Real-Time UAD DSP for Musicians, Producers, Project Studios
Ideal for musicians, producers, and engineers working in project studios, the Universal Audio Apollo x4 Gen 2 with Analog Classics Pro Bundle is a 12x18 desktop Thunderbolt 3 audio interface that offers four Unison mic/line preamps with Auto-Gain, flagship, Gen 2 Elite-Class 24-bit / 192 kHz AD/DA conversion, and QUAD Core DSP for real-time UAD plug-in processing over Thunderbolt at near-zero latency—on Mac and Windows computers. The Analog Classics Pro Bundle lets you mix and record live performances with over 80 UAD plug-ins. You can use Plug-In Scenes to recall settings instantly, even in the middle of a performance.
Easily connect the Apollo x4 Gen 2 to professional studio gear with 4x4 analog line-level I/O, two Hi-Z instrument inputs, and two monitor outputs via 1/4" connections. Optical ADAT or S/PDIF I/O is also available for connection to professional, digital outboard hardware. You can mix with confidence in any room using Apollo Monitor Correction powered by Sonarworks. Hear all the low-end detail in your mixes using Bass Management to add a subwoofer to your monitor setup. Quickly set up low-latency cues, plug-in scenes with the UAD Console app.
What's New with Gen 2?
- New look and feel, updated industrial design with new knobs and switch caps
- Improved Elite-Class Gen 2 D/A converters
- Improved monitor and headphone outputs for best-in-class critical listening
- Even lower THD% and increased DNR
- Assistive Auto-Gain, supporting one-click configuration across all input channels with select Unison preamps, for effortless recording
- Built-in room correction enabling Sonarworks SoundID profiles to run on built-in DSP
- Bass Management for subwoofers in both stereo and surround configurations
- New UAD Console brings Auto-Gain, Unison, Apollo Room Correction, DSP Pairing, Dante Support, Multichannel Immersive Audio Monitoring, Bass Management, Plug-In Scenes over MIDI, and more—together under one roof
- New Analog Classics and Analog Classics Pro software bundles with UAD plug-ins and Instruments
Record Through Four Unison Preamps
- With Unison technology, Apollo x4 Gen 2 lets you track in real time with the sound of classic EQs and compressors.
- From Neve, API, Manley, Fender, and more, you get the same rich analog textures used on the greatest recordings of our time.
Hear the Details Like Never Before
- Apollo x4 features UA's high-resolution A/D and D/A converters, delivering 129 dB of dynamic range.
- This enhanced monitoring, when paired with the newest features like Apollo Monitor Correction by Sonarworks, means you'll hear the most accurate representation of your recordings when mixing through monitors or headphones. And there will be no surprises when you listen to your final mix or master on any stereo system.
Auto-Gain: Never Miss The Take
- Set input gain across multiple channels in seconds without fear of clipping using the new Auto-Gain feature—available on all microphone / line / Hi-Z preamp inputs.
- Effortlessly set gain for recording during an auto-training time listening window, without having to worry or take a lot of time to find the perfect recording level.
Bass Management
- Add a subwoofer with the new bass management feature for full-range stereo monitoring.
- Speaker utility panel provides trim, mute, and solo per speaker output.
Apollo Room Correction
- Room Correction runs on a single SHARC DSP core with UA’s studio-grade low-latency EQ algorithms, using over 20 precision filters and up to 100 ms of loudspeaker time alignment to transform your monitoring accuracy.
- Create SoundID Reference measurements for Apollo Room Correction directly within the SoundID Reference Measure desktop application.
Find Your Flow in the UAD Console App
- Just like an analog studio, where a console is the heart of the workflow, Apollo x4 has a powerful digital mixing engine, where you control plug-in routing and monitoring.
- With the latest features like Bass Management and Plug-In Scenes, it’s easy to find a flow that fits your needs.
A Hybrid System, Made for Your Mission
- Combine Apollo x4’s QUAD Core DSP with native processing from your host computer.
- 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 your studio by linking up to four Thunderbolt Apollo interfaces with up to 128 channels of premium I/O.
- Control it all from your desktop using Apollo x4.
Key Features
- 12x18 Thunderbolt audio interface with QUAD Core DSP real-time plug-in processing
- Includes up to 80+ UAD plug-ins with Analog Classics Pro bundle
- 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
- Full-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
- 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
Includes UAD Analog Classics Pro Bundle with 80+ Plug-Ins
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 and 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
UPC: 819937004704