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Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics , $1,899.00 - Add to Cart Skip to Product Information

Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics

12-in/18-out, 24-bit/192kHz, Thunderbolt 3 Audio Interface with QUAD Core Processor, 4 Unison Preamps, Auto-Gain, Apollo Monitor Correction, and Analog Classics Plug-in Suite - macOS/Windows
Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics
Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics

Please note: Thunderbolt cable not included. If you have questions, please contact us.

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Universal Audio Apollo x4 Gen 2 Thunderbolt Audio Interface with UAD Analog Classics
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Now Ready for Your Studio: The Best Apollo Yet

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Our Product Research Team

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Boasting next-generation elite-class AD/DA, Universal Audio’s Apollo x4 Gen 2 yields the lowest distortion and widest dynamic range of any desktop Apollo to date. The Apollo x4’s powerful onboard plug-in processing provides you with award-winning emulations of tried-and-true studio classics that you can track through in real-time using UA’s vaunted Unison preamp technology. Of course, you can also combine Apollo x4’s onboard DSP with your host computer’s native processing to create a powerhouse hybrid workflow. Meanwhile, you’ll be able to mix confidently in any room or through headphones using Apollo Monitor Correction (an optional add-on); plus, Bass Management optimizes your subwoofer for maximum low-frequency detail. You’ll never miss a take again, courtesy of Apollo x4’s Auto-Gain feature, which sets your levels across multiple inputs. Full-featured monitor control with speaker switching and integrated talkback are also in play. Furthermore, the updated UAD Console app enables you to quickly set up low-latency cues, plug-in scenes, and immersive audio monitoring, in addition to lock-tight LUNA integration. You also get near-zero latency and ample expandability, thanks to Apollo x4’s ultra-fast Thunderbolt 3 connectivity. On the fence regarding a performance upgrade? Now is the time to make the jump — Universal Audio’s Apollo is truly better than ever!

Powerful hybrid workflow

Apollo x4’s onboard plug-in processing enables you to track in real-time with Neve, Manley, or API channel strips or run high UAD plug-in counts while mixing in your DAW with zero strain on your host computer. Once you’re able to inject guitars with the tube warmth of a Pultec EQ, add the musical limiting of an LA-2A to a vocal, and pump up drums with an 1176 or Fairchild 670, you’ll wonder how you got along without UA’s industry-leading DSP-accelerated plug-ins. What’s more, since you can also run your UAD plug-ins natively, you’ll be able to combine Apollo x4’s integrated processing with your host computer’s native processing to create a robust hybrid workflow capable of tackling even larger sessions with even more complex plug-in chains.

Leading-edge Unison preamps

Apollo x4’s Unison preamp technology enables you to track in real-time through faithful emulations of classic gear from Neve, Manley, API, and dozens more, giving you the same rich analog textures used on the greatest recordings of all time. Unison goes far beyond traditional software modeling, however, in that it adjusts the preamp circuit itself, including parameters such as impedance, analog gain structure, and much more. When you adjust the Apollo x4’s preamp gain knob and physical controls, the plug-in adjusts the preamp’s behavior to match the target preamp. So you’re not simply filtering your audio to approximate the character of a famous preamp — your microphone is now interacting with Apollo x4’s input the same way it would behave with the modeled preamplifier.

Elite-class AD/DA with enhanced monitoring

When they were designing the second-generation Apollo X interfaces, UA’s engineers set out to craft the highest-quality elite-class 24-bit/192kHz AD/DA conversion of any Apollo yet. After giving Apollo x4 a serious listen here at Sweetwater, we firmly believe that they succeeded; its ultra-pristine signal path is audibly apparent, and even on paper, its 129dB DNR and -120dB THD+N specs speak for themselves. Moreover, Apollo x4 includes an optional add-on for Apollo Monitor Correction, which allows you to apply Sonarworks SoundID Reference profiles to UA’s precision EQ filters running in real-time on Apollo’s onboard DSP. Whether you listen on your studio monitors or through a high-end set of headphones, you’ll hear every detail of your mix with the utmost accuracy.

Assistive Auto-Gain and seamless sub management

Recording with Apollo x4 is easier than ever, thanks to its assistive Auto-Gain feature, which can be applied to multiple channels simultaneously to ensure proper levels all across the board. Best of all, you can deploy Auto-Gain on all the interface’s inputs — microphone, line-level, and hi-Z alike — and even with select Unison preamp models! Whether you’re working in stereo or 9.1.6 Dolby Atmos, having a monitoring setup with well-tuned low-end is crucial to crafting mixes that translate. That’s where Apollo x4’s Bass Management feature comes in, leveraging a real-time DSP-driven Linkwitz-Riley crossover to integrate and optimize your subwoofer seamlessly.

Lock-tight LUNA integration

Apollo x4 boasts ultra-tight hardware/software integration with Universal Audio’s free LUNA DAW software, enabling you to take control of your interface’s monitoring, talkback, and headphone systems, track and overdub with UAD DSP-accelerated plug-ins in real time, and benefit from full software-based control over Apollo’s Unison mic preamps, all without leaving your production software. LUNA also includes Accelerated Realtime Monitoring, which supplies fast analog-style tracking and overdubbing using Apollo’s onboard processing. You also get unlimited track counts, contextual editing and browsing, UAD and AU plug-in compatibility, a session auto-save function, and AAF importing. This software also supports LUNA extensions, which bake directly into LUNA’s mixer — no need to instantiate a bunch of plug-ins. LUNA is the closest you’ll come to an analog workflow in the software realm. It delivers spot-on analog sound, along with the creative immediacy of real-time processing.

Sensational plug-in bundle included!

UAD powered plug-ins have earned their reputation for being accurate emulations of analog audio equipment ever created. The astonishing processing power of the UAD platform is what makes these plug-ins sound so great. You simply can’t get the depth, color, and character these plug-ins have without devoting huge CPU resources to them. Best of all, Apollo x4 lets you record your audio through UAD plug-ins in real time with near-zero latency. When you buy Apollo x4 Essentials+ Edition, you’ll receive a generous suite of award-winning plug-in titles:

Channel Strips & Preamps

  • Century Tube Channel Strip
  • CS-1 Channel Strip
  • LA-6176 Signature Channel Strip
  • Precision Channel Strip
  • UA 610-A Preamp & EQ
  • UA 610-B Preamp & EQ

Compressors / Limiters

  • Fairchild 670 Legacy Compressor
  • Teletronix LA-2A Legacy Leveling Amplifier
  • Teletronix LA-2A Tube Compressor
  • Precision Buss Compressor
  • UA 1176 FET Compressor
  • UA 1176LN Legacy
  • UA 1176SE Legacy

Equalizers

  • Precision Equalizer
  • Pultec EQP-1A Legacy EQ
  • Pultec Pro Legacy EQ

Special Processing

  • Oxide Tape Recorder
  • Precision De-Esser
  • Precision Enhancer Hz
  • Precision Enhancer kHz
  • Vibe Analog Machines Essentials

Instruments

  • PolyMAX Polyphonic Synth

Delay & Modulation

  • Galaxy Tape Echo
  • Precision Delay Mod
  • Precision Delay Mod L

Reverbs and rooms

  • Precision Reflection Engine
  • Pure Plate Reverb

Mastering

  • Precision Limiter
  • Precision Maximizer
  • Precision Multiband

Guitar and Bass

  • Bermuda Triangle

  • Raw Distortion

  • TS Overdrive Pedal

  • UAD Lion ’68 Super Lead Amp

  • UAD Showtime ’64 Tube Amp

Universal Audio Apollo x4 Gen 2 Analog Classics Features:

  • 12-in/18-out Thunderbolt 3 audio interface for Mac or PC with powerful onboard plug-in processing
  • Next-generation elite-class AD/DA conversion supplies an ultra-pristine signal path with 129dB DNR and -120dB THD+N
  • Unison preamps allow you to track through models of the industry’s most legendary hardware
  • Onboard DSP combines with your host computer’s native processing to create a powerhouse hybrid workflow
  • Apollo Monitor Correction (optional add-on) empowers you to mix confidently in any room or through headphones
  • Bass Management optimizes your subwoofer for maximum low-frequency detail
  • Auto-Gain feature sets levels across multiple inputs
  • Full-featured monitor control with speaker switching and integrated talkback
  • Updated UAD Console app quickly sets up low-latency cues, plug-in scenes, and immersive audio monitoring
  • Compatible with UA’s LUNA software for ultra-tight hardware/software integration
  • Ultra-fast Thunderbolt 3 connectivity provides near-zero latency and ample expandability
  • Includes the UAD Analog Classics plug-in suite of 30 award-winning UAD plug-ins with accurate emulations of vintage analog hardware

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.