Universal Audio Apollo X4 Thunderbolt 3 Audio Interface, (APX4) Review (June 2024)


Last updated on June 13, 2024 10:30 pm Details


In this review post we’re going to be discussing the Universal Audio Apollo X4 Thunderbolt 3 Audio Interface, (APX4), including an overview of its unique features.

Product Description

  • Desktop 12 x 18 Thunderbolt 3 audio interface for Mac and Windows, Elite-class A/D and D/A conversion derived from the Apollo X rackmount interfaces
  • Includes FREE download of LUNA Recording System, which transforms all Thunderbolt equipped Apollo and Arrow interfaces into a full-featured music creation, recording, and analog-style production system for Mac
  • 4 Unison mic preamps offer stunning models of classic tube and transformer-based mic preamps and guitar amps
  • UAD-2 QUAD Core processing for tracking through vintage compressors, EQs, tape machines, mic preamps, and guitar amp plug-ins with near-zero latency
  • 2 Unison-enabled front panel Hi-Z instrument inputs, and 2 independent front panel headphone outputs
  • Built-in Talkback mic and dedicated monitor functionality including monitor remote functions and Mono, Mute, DIM, and ALT monitor controls
  • Up to 8 channels of additional digital input and output via optical ADAT and S/PDIF
  • Includes the “Real time Analog Classics Plus” UAD plug-in bundle featuring the Teletronix LA-2A and 1176 compressors, Pultec EQs, UA 610-B Tube Preamp & EQ, and more
  • Runs UAD Powered Plug-Ins via VST, RTAS, AU, and AAX 64 in all major DAWs
  • 1 Year Manufacturer’s Warranty if purchased from an Authorized UA Retailer

Product Features

Pros & Cons


  • Strong build
  • Affordable
  • Extremely dependable
  • Favorable customer feedback
  • Worth the price
  • Wonderful sound output
  • Ideal for studio recording and live performance


  • Bulky in size
  • Quite pricey
  • Alternative products which may be better expensive
  • Mixed opinions about product

Universal Audio Apollo X4 Thunderbolt 3 Audio Interface, (APX4) Demo

[Include Youtube Video]

Our Verdict

Where to Buy

The best place to buy this product has to be Amazon, due to their competitive pricing and fantastic customer service.

Pricing History

Buyers Guides This Product Is Featured In

Additional information

Item Weight

5.64 pounds

Product Dimensions

11 x 9 x 6 inches

Item model number


Date First Available

September 19, 2019

Compatible Devices

Personal Computer

Digital Audio Protocol

Thunderbolt 3



Operating System

Mac & Windows


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