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Selling due to lack of use: APOLLO X 4 (Quad) Gen 1

Kept in immaculate condition in a smoke-free home studio, complete with original packaging. Perfectly working. I’m in Rome but often travel to Siena, passing through Grosseto or Orvieto, so if you live along the way, I can bring it to you.

Includes the plugins from the Realtime Analog Classics Plus bundle:

• UA 610-B Tube Preamp & EQ (Unison): UA’s classic tube preamp for vocals and instruments.
• Teletronix LA-2A (Legacy): The world’s most famous tube optical compressor, smooth and natural.
• UA 1176LN & 1176SE (Legacy): Ultra-fast solid-state compressors, ideal for adding punch and presence.
• Fairchild 670 (Legacy): A prestigious vintage tube compressor for warming up and tightening mixes.
• Pultec EQP-1A & Pultec-Pro (Legacy): Legendary passive tube equalizers, famous for deep lows and silky highs.
• Ampeg SVT-VR Classic (Unison): The ultimate rock bass amplifier.
• Marshall Plexi Classic (Unison): The iconic British rock guitar amplifier.
• Raw Distortion (Unison): An emulation of the famous vintage ProCo Rat distortion pedal.
• RealVerb Pro: A flexible, highly customizable acoustic reverb.
• Precision Mix Rack Collection (5 plugins): Includes Precision Channel Strip, Reflection Engine, Delay Mod, Delay Mod L, and Precision Enhancer Hz for everyday mixing and utility tasks.

Does not include the Thunderbolt cable, which must be purchased separately (Universal Audio sells the original package without a cable). It works perfectly not only with Mac but also with Windows and a Thunderbolt 4 port.

They say all plugins are good nowadays, but the reality is that for a home studio, Unison preamps and certain Universal Audio plugins are still superior.

Is it just a coincidence that when it comes to compressors and reverbs, I always end up using these instead of the dozens of others I have???

Listeda day ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • Apollo x4 QUAD Thunderbolt 3 Audio Interface
Finish
  • Gray
Categories
Made In
  • United States
Sample Rate
  • 192 khz
Bus-Powered
  • No
Electronics
  • Digital
  • Analog
  • Solid State
Digital Output Format
  • ADAT/Optical
Compatibility
  • macOS
  • Windows
Format
  • Desktop Standalone
Digital Input Format
  • ADAT/Optical
Bit Depth
  • 24-bit
Computer Connectivity
  • Thunderbolt
Simultaneous I/O
  • 12 x 18
Number of Channels
  • 28
Number of Headphone Outputs
  • 2
Number of MIDI Outputs
  • 0
Number of MIDI Inputs
  • 0
Number of Digital Outputs
  • 8
Number of Digital Inputs
  • 8
Number of Analog Outputs
  • 6
Number of Analog Inputs
  • 6
Number of Mic Preamps
  • 4

Product safety information may be available here.

Filippo

Roma, Italy
Joined Reverb:2026

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