Essential Information About the Universal Audio Apollo x4 Audio Interface
- 4 Unison preamps and UAD-2 Quad DSP for recording and mixing with emulations of legendary studios.
- 24-bit/192 kHz conversion and 127 dB dynamic range for precise stereo imaging and generous headroom.
- Professional level monitoring: Auto-Gain, Talkback, Mono/Mute/DIM/ALT controls, and Monitor Correction powered by Sonarworks.
- Comprehensive connectivity in a desktop Thunderbolt 3 format, expandable via ADAT/SPDIF, with two independent headphone outputs.
The Desktop Reference That Extends the Apollo Legacy
Designed as the powerful evolution of the Apollo Twin, the Apollo x4 sits between desktop models and rack-mounted Apollos. It carries forward the conversion quality and UAD workflow that have made Universal Audio renowned, while adding more inputs/outputs, advanced monitoring features, and a Quad DSP for more ambitious sessions.
Who Is It For and What Are Its Uses?
Ideal for demanding home studios, mobile producers, and small professional studios, the Apollo x4 excels with vocals, guitars, keyboards, and multi-source recordings. Its integrated Talkback facilitates communication with artists, its two headphone outputs easily handle two independent headphone mixes, and the optical input/output allows channel count expansion as needed.
Key Features and Innovations
Unison and DSP for "Mix-Ready" Recordings
The four Unison preamps replicate the impedance, gain, and coloration of legendary preamps and console channels (Neve, API, Manley...). Paired with the UAD-2 Quad processor, they enable real-time tracking with UAD compressors, equalizers, and guitar/bass amps to capture the right tone immediately without overloading your CPU.
High-End Conversion and Monitoring Control
With 24-bit/192 kHz conversion and a 127 dB dynamic range, the Apollo x4 delivers remarkable detail. Built-in control tools - Auto-Gain, Monitor Correction powered by Sonarworks, Mono/Mute/DIM/ALT controls - ensure reliable mixing decisions on both speakers and headphones.
UAD Console: A Modern Workflow
The UAD Console application centralizes routing, plug-in loading, and monitoring. Plug-in scenes, the bass manager, and gain automation speed up project setup and recall of your favorite processing chains.
Technical Specifications
Connectivity and DSP
- Thunderbolt 3 audio interface
- UAD-2 Quad processor
- Thunderbolt 3 port (optional Thunderbolt cable not included)
Conversion and Audio
- 24-bit/192 kHz A/D and D/A converter
- Dynamic range: 127 dB
Preamps and Inputs
- 4 Unison microphone preamplifiers
- 4 microphone/line inputs on combo XLR/6.3 mm TRS jacks
- 2 Hi-Z instrument inputs on 6.3 mm jack
- Optical ADAT/SPDIF input/output
- +48 V phantom power
- Auto-Gain function
- Integrated Talkback microphone
Outputs and Monitoring
- 4 line outputs on 6.3 mm jack
- 2 monitor outputs on 6.3 mm jack
- 2 stereo headphone outputs on 6.3 mm jack
- Monitoring functions with control elements: Mono, Mute, DIM, and ALT
Software and Compatibility
- UAD Console application with plug-in scenes, bass manager, and Monitor Correction powered by Sonarworks
- Includes: Essentials+ plug-in bundle
- Compatibility: Mac OS and Windows
Power Supply and Form Factor
- Input for external power supply unit
- Dimensions (W x H x D): 233 x 151 x 66 mm
- Weight: 1.46 kg
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