Universal Audio Apollo x4 Gen 2 – Analog Classics Pro is a desktop 12-in / 18-out Thunderbolt 3 audio interface designed for musicians, producers and recording engineers who need flexible connectivity, real-time UAD processing and an extensive collection of studio software. Featuring four Unison-enabled microphone preamps, two front-panel instrument inputs and onboard QUAD Core DSP, it allows multiple performers to record through compatible preamp, compressor and amplifier emulations with near-zero latency. Gen 2 audio conversion, dual headphone outputs, optical digital expansion and integrated monitor control make it a versatile centrepiece for collaborative recording. The Analog Classics Pro bundle adds more than 80 plug-ins spanning recording, mixing, mastering and sound design.

Key features

• 12-in / 18-out Thunderbolt 3 audio interface
• Gen 2 audio conversion at up to 24-bit / 192 kHz
• 4 Unison-enabled microphone preamps
• 4 rear-panel XLR/TRS microphone and line inputs
• 2 front-panel Hi-Z inputs for guitars or basses
• QUAD Core DSP for real-time UAD plug-in processing
• Optical digital input and output supporting ADAT or S/PDIF
• Balanced stereo monitor outputs and 4 additional line outputs
• 2 stereo headphone outputs with independent level controls
• Built-in talkback microphone and alternate speaker switching
• Auto-Gain, Plug-In Scenes and flexible routing through UAD Console
• Apollo Monitor Correction support powered by Sonarworks
• Analog Classics Pro bundle with more than 80 included plug-ins

Overview

Included Content

• Universal Audio Apollo x4 Gen 2 audio interface
• External power supply
• UAD Analog Classics Pro software bundle, available through registration
• UAD Console and supporting software available to download
• Preamp and channel-strip highlights: Neve 1073, API Vision, Avalon VT-737sp, Manley VOXBOX, SSL E Series and UA 610-A/B
• Dynamics highlights: Empirical Labs EL8 Distressor, Fairchild compressors, Teletronix LA-2A models, 1176 limiters and SSL G Series Bus Compressor
• Effects highlights: Pultec EQs, Studer A800, Ampex ATR-102, Lexicon 224, Galaxy Tape Echo and Pure Plate Reverb
• Additional instruments, guitar amplifiers, vocal tools and LUNA extensions included within the Pro bundle

Creative Tools

• Record up to four analogue sources simultaneously through the microphone/line inputs, supporting vocal ensembles, acoustic sessions, stereo instruments and collaborative songwriting.
• Explore the included Unison-compatible preamps and channel strips to shape input impedance, gain behaviour and tonal character during recording.
• Connect two guitars or basses directly to the front-panel Hi-Z inputs and create separate recording tones with included amplifier and pedal emulations.
• Build real-time recording and monitoring chains using four onboard DSP cores. Available processing capacity depends on the selected UAD plug-ins and sample rate.
• Create separate headphone mixes through UAD Console, allowing two performers or a producer and musician to monitor the session according to their needs.
• Develop vocal and instrument chains using the Pro bundle’s preamps, compressors and equalisers, then add ambience with room, plate and digital reverbs.
• Add tape character with Studer A800 or Ampex ATR-102, shape dynamics with the Distressor or classic levelling amplifiers, and explore modulation and delay effects during production.
• Use Auto-Gain and Plug-In Scenes in UAD Console to establish recording levels and recall processing configurations for different performers or sessions.
• Expand the studio through optical ADAT connections by adding compatible microphone preamps, converters or digital equipment.
• Compare mixes through alternate speakers and communicate with performers using the built-in talkback microphone.
• Refine monitor or headphone playback with Apollo Monitor Correction when paired with the required Sonarworks SoundID Reference software and compatible calibration equipment.

Ideal For

• Music producers
• Recording and mixing engineers
• Songwriters and collaborating musicians
• Vocal and acoustic recording sessions
• Guitarists and bassists
• Home and project studios
• Producers working with LUNA
• Studios requiring optical digital expansion
• Anyone seeking a desktop Apollo interface with four Unison preamps, QUAD Core DSP and an extensive collection of studio plug-ins