Universal Audio Apollo x4 Gen 2: 12x18 Desktop Interface with 4 Unison Mic Pres & QUAD Core Processing

The Universal Audio Apollo x4 Gen 2 expands the desktop format into a true professional recording hub, now enhanced with next-generation Universal Audio architecture. Offering a comprehensive 12x18 I/O configuration, four Unison-enabled mic preamps, and QUAD Core realtime processing, it is designed for producers who need to record multi-mic setups without upgrading to a rackmount system. The Gen 2 model introduces upgraded 130 dB dynamic range conversion, intelligent Auto-Gain, and hardware-integrated Apollo Monitor Correction, allowing you to track full bands or complex synth rigs with zero latency and absolute analog authenticity.

Uncompromising Audio Power and Precision

• Next-Gen Elite Conversion: Upgraded converters push the D/A dynamic range to a staggering 130 dB, matching the performance of the flagship rackmount units.
• Intelligent Gen 2 Workflow: Features one-click Auto-Gain to prevent clipping during fast-paced sessions, plus DSP-powered Apollo Monitor Correction to flatten out room acoustic anomalies.
• Four Unison™ Preamps: Track through four flawless emulations of iconic tube and solid-state preamps simultaneously, capturing the exact impedance and gain-staging behaviors of the original vintage hardware.
• Expanded Desktop I/O: Features 4 mic/line inputs, 2 front-panel Hi-Z inputs, 4 line outputs, 2 independent headphone outs, and optical ADAT I/O, providing immense flexibility for a desktop unit.

Select Your UAD Software Bundle

Customize your studio with one of two powerful included software collections:

• UAD Analog Classics (30+ Plug-ins): Provides the essential foundation for professional tracking and mixing. Includes the Century Tube Channel Strip, LA-6176 Signature Channel Strip, Pultec EQP-1A, Teletronix LA-2A, 1176 compressors, PolyMAX synth, and a suite of precision delays, reverbs, and mastering tools.
• UAD Analog Classics Pro (80+ Plug-ins): The ultimate studio upgrade. Expands your arsenal with flagship emulations from API, SSL, Neve, Manley, and Fairchild. Also includes the Topline Vocal Suite, Ampex ATR-102 Mastering Tape, Lexicon 224 Reverb, Ocean Way Studios, and native LUNA Extensions (API Summing, Studer A800).

The RSPE Advantage: Elite Studio Integration

As industry leaders in professional audio, we provide more than just equipment. Our team brings decades of advanced technical expertise in designing, tuning, and integrating high-end tracking and mastering environments. Whether you are building a streamlined desktop production suite or integrating multiple interfaces into a multi-room commercial studio, we ensure your system operates perfectly. We understand the precise technical requirements of modern recording facilities, ensuring your interface operates at its absolute peak performance.

Frequently Asked Questions (FAQ)

Can I route separate headphone mixes to the two headphone jacks?
Yes, the Apollo x4 Gen 2 features two independent headphone outputs. Using the UA Console software, you can easily route completely distinct cue mixes to each headphone jack for different performers.

Does the x4 Gen 2 support surround sound monitoring?
No, comprehensive surround sound monitoring capabilities are reserved for the rackmount Apollo Gen 2 models (x6, x8, x8p, x16). The x4 Gen 2 is designed strictly for high-end stereo mixing and tracking.

Technical Specifications

• Type: 12x18 Thunderbolt Desktop Audio Interface (Gen 2)
• A/D Resolution: 24-bit/192kHz
• Analog Inputs: 4 x XLR-1/4" combo (Mic/Line), 2 x 1/4" (Hi-Z)
• Analog Outputs: 2 x 1/4" (Monitor), 4 x 1/4" (Line out)
• Digital I/O: 1 x Optical Toslink (ADAT/S/PDIF In), 1 x Optical Toslink (ADAT/S/PDIF Out)
• DSP Processing: UAD-2 QUAD Core
• Preamps: 4 x Unison-enabled microphone preamps