Product Overview

Expanded Physical I/O Meets UA’s Most Powerful Studio Software Suite

When two preamp inputs limit your workflow, the Apollo x4 Gen 2 Studio+ Edition steps in with expanded physical boundaries and high-headroom performance tracking. With four onboard analog combo preamps, six balanced line outputs, and twin front-panel Hi-Z inputs, it is custom-built for tracking live collaborations, acoustic multi-mic setups, analog synthesizer arrays, or a focused drum kit without needing to daisy-chain rackmount expansion units.

The magic of the Gen 2 platform lies in its premium digital audio conversion paths. Re-engineered to offer lower noise floor distortion and spatial imaging clarity, it lets you monitor mixes with mastering-grade precision. Backed by Thunderbolt 3 connectivity on macOS and Windows, its built-in QUAD Core hardware processing core manages your UAD processing natively inside the unit, ensuring your computer's DAW timeline remains smooth and latency-free.

Product Description

Premium Studio+ Software Suite: Your Digital Outboard Rack:

The core highlight of the Studio+ Edition is its extensive software footprint. Moving far beyond entry-level tracking plug-ins, this comprehensive bundle provides a virtual boutique outboard rack with premium processors modeled down to the component level:

• Elite Outboard Preamps & Channel Strips: Track through legendary signal paths like the Avalon VT-737sp Tube Channel Strip, Manley Reference Microphone Preamp, and Helios Type 69 Preamp & EQ.

• Classic Dynamic Control: Sculpt your sounds with the Empirical Labs Distressor, dbx 160 Compressor/Limiter, and UA 175B/176 Tube Limiters, plus complete legacy collections of the Teletronix LA-2A and UA 1176.

• Premium Reverb & Tape Warmth: Inject deep depth and vintage tape saturation using the Lexicon 224 Digital Reverb, Capitol Chambers, and the Studer A800 Multichannel Tape Recorder.

• Virtual Instruments: Compose tracks with flagship engines like the Moog Minimoog synthesizer, Opal Morphing Synth, and the pristine Ravel Grand Piano.

Four Unison Preamps with Assistive Auto-Gain:

The interface houses four Unison-enabled microphone/line combo preamps alongside two front-panel Hi-Z instrument inputs. Unison technology creates a physical, bi-directional hardware link where loading a modeled plugin shifts the physical interface’s actual input impedance, front-end gain sweet spots, and analog circuit component behaviors to match classic Neve, API, and SSL desks. To speed up setup times, the Gen 2 platform introduces Assistive Auto-Gain. With a single click in the UAD Console application, the interface automatically listens, calculates, and sets ideal input level gain architecture across multiple channels, protecting your signal from digital clipping.

Elite Gen 2 Audio Conversion & Room Calibration:

The foundation of the Gen 2 line is its upgraded monitoring matrix. Delivering an ultra-wide 129 dB dynamic range and an pristine -120 dB THD+N, the x4 Gen 2 provides the exact spatial separation needed for critical mixing and mastering decisions.

To overcome environmental room acoustics, the hardware executes Apollo Monitor Correction powered by Sonarworks®. This lets you run custom SoundID Reference calibration profiles directly on the interface’s internal DSP chip. The acoustic profile processing runs with zero added latency, allowing you to monitor through an honest, flattened speaker or headphone curve without straining your host computer's CPU.

Desktop Monitor Control & Crossover Balancing:

The desktop enclosure serves as a fully integrated monitor controller, featuring physical keys for Alt speaker switching, Mono summing, Dim, and Mute, along with an onboard Talkback Microphone for seamless communication with artists. For project studios using subwoofers, the updated UAD Console App introduces hardware-driven Bass Management, allowing engineers to establish precise low-frequency crossover parameters directly within the interface's digital matrix.

Key Features

• QUAD CORE SHARC DSP PROCESSING: Four dedicated internal processing chips handle demanding tracking chains and large mixing workloads natively on the hardware.

• GEN 2 ELITE-CLASS AUDIO CONVERSION: Upgraded D/A monitoring paths deliver an impressive 129 dB of dynamic range for clinical monitoring precision.

• EXPANDED STUDIO+ BUNDLE: Packed with premium UAD titles including the Avalon VT-737, Empirical Labs Distressor, Lexicon 224, and Moog Minimoog.

• FOUR UNISON MIC PREAMPS: Track in real time with near-zero latency through authentic, variable-impedance circuit models of Neve, Manley, and API hardware.

• ASSISTive AUTO-GAIN CONTROL: Instantly establishes and locks in optimal input recording gain setups across multiple tracking channels simultaneously.

• APOLLO MONITOR CORRECTION: Runs Sonarworks® SoundID Reference speaker profiles directly on internal DSP with zero added system latency.

• HARDWARE BASS MANAGEMENT: Fast, integrated subwoofer routing and crossover controls inside the UAD Console app for precise low-end balancing.

• DUAL HEADPHONE MONITORING: Features two independent stereo headphone jacks on the front panel with separate analog volume control pots.

• THUNDERBOLT 3 CONNECTIVITY: Delivers rock-solid driver stability and ultra-low round-trip latency on modern Mac and Windows operating systems.

Technical Specifications

What’s Included in the Box

• 1 x Universal Audio Apollo x4 Gen 2 Desktop Audio Interface

• 1 x External 12V DC Power Supply Adapter with International Socket Kit

• 1 x UAD Studio+ Edition Software Suite Activation and Authorization Guide

• 1 x Official Universal Audio Product Registration and Factory Warranty Sheet

• (Note: Connecting Thunderbolt 3 / Thunderbolt 4 cables are sold separately)