Universal Audio Apollo x4 Gen 2 Studio+
Product information "Universal Audio Apollo x4 Gen 2 Studio+"
Desktop 12 x 18 Thunderbolt audio interface with four Unison microphone preamps, Apollo X Gen 2 elite‑class audio conversion, Auto‑Gain, Apollo Monitor Correction, bass management, QUAD Core DSP plug‑in processing and premium software suite.
Record and mix larger sessions and hear every detail with the next generation of UA's Apollo x4 interfaces, which feature ultra‑high‑resolution audio conversion, four Unison™ microphone preamps and QUAD Core DSP processing, allowing you to record in real time with UAD plug‑ins from Neve, Manley, Avalon, SSL and hundreds more.
Apollo x4 is trusted by top artists and producers worldwide and elevates your productions with timeless tone and legendary UA craftsmanship — built to inspire your next collaboration.
Main benefits:
- Hear the next generation of audio conversion with the greatest dynamic range and lowest distortion of any Apollo model
- Experience analogue tones with Unison™ preamps that let you record in real time through authentic emulations of Neve, API, Avalon, Manley, Fender and more
- Access the entire library of 200+ UAD DSP and Native plug‑ins, including award‑winning titles like Capitol Chambers, Sound City Studios, EL8 Distressor, and more
- Mix with confidence in any room or on headphones with Apollo Monitor Correction powered by Sonarworks®*
- Use Auto‑Gain to set your levels across multiple inputs in seconds so you never miss a take
- Hear every detail in the low end of your mixes by adding a subwoofer to your monitor setup
- Quickly set up low‑latency cue mixes, plug‑in Scenes and immersive audio monitoring with the UAD Console App
- Receive award‑winning UAD plug‑ins from Auto‑Tune, Fairchild, Teletronix and more worth thousands with a selection of Essentials+ or Studio+ editions
Get the most powerful desktop Apollo ever
Universal Audio designed Apollo x4 to expand the gold‑standard Apollo Twin — the interface that single‑handedly revolutionised recording in home and project studios. With its increased I/O, unprecedented dynamic range and top‑tier 24‑bit/192‑kHz audio conversion — now with improved monitoring — Apollo x4 brings the stars' sound within reach of project studios and collaborators.
Record through legendary preamps
With four Unison™ preamps and two front‑panel Hi‑Z instrument inputs, Apollo x4 enables real‑time tracking through preamp and channel‑strip plug‑ins from Neve, Manley, API and dozens more, delivering the same rich analogue textures heard on the most notable productions of our time.
Mix with authentic analogue sounds
Apollo x4 gives you the tools used in the world's largest recording studios straight out of the box. Together with the included Teletronix LA‑2A compressors, Pultec EQs and Marshall and Ampeg amps, you can access the full library of 200+ UAD plug‑ins and unleash proven, hit‑ready sounds like Ocean Way Studios, Capitol Chambers and many more.
Hear the details like never before
Now in Gen 2 design, Apollo x4 features UA's ultra‑high‑resolution D/A converters, paired with Apollo Monitor Correction powered by Sonarworks®. That means when you play back your recordings through monitors or headphones you not only hear an accurate representation of your work, but you also avoid surprises when you check your final mix or master.
Find your flow in the UAD Console App
Just like an analogue studio where a console is the workflow hub, Apollo x4 features a powerful digital mixing engine that controls 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 workflow that fits your needs.
A hybrid system built for your mission
Combine Apollo x4's QUAD Core DSP with your host computer's native processing to build large sessions with complex plug‑in chains — a powerful hybrid workflow that outperforms any purely native recording setup.
Expand your studio as you grow
Build out your studio by connecting up to four Thunderbolt Apollo interfaces for up to 128 channels of premium I/O with your DAW, and control everything from your desktop with Apollo x4. No matter how far your music takes you, an Apollo will always be within reach.
Main features:
- 12 x 18 Thunderbolt audio interface with QUAD Core DSP plug‑in processing
- Four Unison™ microphone preamps, two Hi‑Z instrument inputs, optical Toslink I/O (ADAT or S/PDIF)
- Two 1/4" monitor outputs, four 1/4" line outputs (ALT 1 / 2), two 1/4" TRS headphone outputs
- Apollo X Gen 2 elite‑class converters with 24‑bit/192 kHz resolution
- Improved 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® (requires Apollo Monitor Correction add‑on and SoundID Reference licences)
- Fully functional monitor controller with speaker switching and built‑in talkback for easy communication with performers
- Updated UAD Console App with Auto‑Gain, plug‑in Scenes, subwoofer integration with bass management, immersive audio support and more
- The onboard DSP supports over 200 UAD plug‑ins in VST, AU and AAX 64 formats across 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 selected models via Dante
Included plug‑ins in the Studio+ edition:
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‑2 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 (6):
- Auto‑Tune Realtime Access
- 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 (5):
- Brigade Chorus Pedal
- Galaxy Tape Echo
- Precision Delay Mod
- Precision Delay Mod L
- Studio D Chorus
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
- ADAT-In: Yes, 1 (up to 8 mono channels)
- ADAT-Out: Yes, 1 (up to 8 mono channels)
- AVB: no
- Dante: no
- Design: Desktop
- Direct Monitoring: Yes (Software)
- Displays: LEDs
- Dynamic Range: 129 dB
- Headphone Output: 2x 6,3 mm Stereo Jack
- Hi-Z Input: 2x 6,3 mm Jack (Ch 1-2)
- Includes: Interface, Power Supply, Software
- Input channels that can be used simultaneously: 12
- Line in: 4x XLR/ Jack -Combo (Ch 1-4)
- Line out: 6x 6,3 mm Jack (balanced)
- MADI: no
- Mic-In: 4x XLR/ Jack -Combo (Ch 1-4)
- Onboard Effects: ja, digital
- Power Supply: External Power Adapter
- Rack mounting: no
- Resolution: 24-Bits
- S/PDIF Coaxial I/O: no
- Sampling Rate: 192 kHz
- Subcategory: Thunderbolt Interface
- Supported Operating Systems: macOS and Windows
- Thunderbolt: Thunderbolt 3
- USB: no
- Unison Technology, with 4 SHARC DSP for UAD-2 Plug-Ins (also usable in DAW), Integrated Talkback Microphone, Connecting Cable NOT Included
- Apollo Monitor correction (SoundID reference measure)
- Auto gain function for perfect leveling of the Microphones
- Plug-in scenes via MIDI
- Studio+ Plugin Bundle included
Pioneer in audio recording for more than 50 years
Founded in 1958 by Bill Putnam Sr., Universal Audio has long been synonymous with innovative recording equipment. As the favourite engineer of Frank Sinatra, Nat King Cole, Ray Charles and others, Bill was a passionate innovator who is regarded as the father of modern audio recording. Many of his legendary studio and equipment designs are still in use today. B. Putnam was the inventor of the modern mixing console, the multiband audio equaliser and he was the first engineer to use artificial reverb on commercial recordings. Alongside his friend Les Paul, Bill was also involved in the early development of stereophonic recording.
Putnam, known as a driven entrepreneur, founded three audio product companies during his long career: Universal Audio, Studio Electronics and Urei. All three companies built devices that were widely adopted after their introduction and would shape the studio sound for generations. The boutique compressors LA-2A and 1176 and the 610 tube console are among these legends. Artists such as Sinatra, the Beach Boys and Van Halen recorded their studio albums on the 610 console.
Universal Audio was re-established in 1999 by Bill's sons James Putnam and Bill Putnam Jr. The plan was twofold: on the one hand to faithfully reproduce classic analogue recording gear in their father's tradition; and on the other to bring the sound and spirit of vintage analogue technology into the new digital recording tools .
By now impressive effects pedals for guitarists and specialised guitar-recording tools such as the Universal Audio OX are also part of the range and are extremely popular with fans of outstanding tone.
