Used Universal Audio Apollo x4 QUAD Audio Interface in mint condition with box. Delivering elite-class A/D and D/A conversion, realtime UAD QUAD Core processing, and premium Unison mic preamps. With Thunderbolt 3 connectivity, 4 analog inputs, and up to 127 dB dynamic range, it's perfect for professional music production and mixing. Compatible with Mac and Windows systems, the Apollo x4 brings studio-quality performance to your desktop setup in a compact and durable design.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed21 days ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
Brand
Model
  • Apollo x4 QUAD Thunderbolt 3 Audio Interface
Finish
  • Gray
Categories
Year
  • 2019 - Present
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.

X Chain

Los Angeles, CA, United States
Joined Reverb:2026

Reverb Protection

Simple Returns, Secure Transactions, Human Support

Learn more

Secure Checkout

Promoted similar listings













Product reviews

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Oops, looks like you forgot something. Please check the fields highlighted in red.