Apollo x4 with UAD Analog Classics Pro

Apollo x4 with UAD Analog Classics Pro — a 12x18 desktop Thunderbolt audio interface with four Unison mic preamps and a UAD-2 QUAD Core processor, in the Analog Classics Pro configuration that includes over 80 UAD plugins: preamps, compressors, EQs, instruments, and effects.

Gen 2 Elite-Class AD/DA conversion runs at 24-bit/192kHz with 129dB of dynamic range, using dual-crystal clocking to keep jitter low for critical monitoring. Four mic/line inputs with Unison technology plus two independent front-panel Hi-Z inputs allow recording vocals, guitar, bass, and an acoustic instrument simultaneously, each through a different preamp emulation — Neve, API, Manley, or Fender — without losing character at the point the signal enters.

The full Pro library across four independent tracking paths

The Pro edition extends the standard Analog Classics bundle with reverbs from Capitol Chambers and Sound City Studios, the EL8 Distressor compressor, and instruments and synths. With four Unison inputs, that means vocals, guitar, bass, and an acoustic instrument can be tracked at once, each through a different preamp emulation, with the full effects library available at mixdown without buying additional bundles.

Band monitoring without cutting back on effects

The QUAD Core processor handles UAD plugins independent of the DAW's buffer, so across four simultaneous tracking paths each performer can hear their own fully processed monitor signal — compression, EQ, and reverb — at under 2ms of latency. Expanded outputs (two monitor, four line-level ALT, two headphone) support main monitors, alternate speakers, and separate headphone mixes at the same time.

KEY FEATURES

• 12x18 Thunderbolt 3 audio interface
• 4 Unison mic/line preamps with Auto-Gain, 2 front-panel Hi-Z inputs
• 24-bit/192kHz AD/DA conversion, Gen 2 Elite-Class, 129dB dynamic range
• UAD-2 QUAD Core processor for real-time plug-in processing
• UAD Analog Classics Pro bundle: 80+ plugins (preamps, compressors, EQ, reverbs, instruments, effects)
• Optical Toslink port: ADAT (up to 8 channels) or S/PDIF
• Built-in monitor controller with talkback and alternate speaker switching
• Cascading up to 4 Apollo interfaces, up to 128 channels of I/O
• Sonarworks Apollo Monitor Correction for room and headphone calibration

TECHNICAL SPECIFICATIONS

• Configuration: 12 inputs / 18 outputs
• Conversion: 24-bit / 192kHz, Gen 2, dual-crystal clocking
• Dynamic range: 129dB
• Analog inputs: 4 x XLR/TRS combo Unison, 2 x 1/4" Hi-Z (front panel)
• Analog outputs: 2 x 1/4" monitor, 4 x 1/4" line ALT, 2 x TRS headphone
• Digital I/O: 1 x optical Toslink (ADAT up to 8 channels or S/PDIF)
• Computer connection: Thunderbolt 3
• DSP: UAD-2 QUAD Core
• Compatibility: LUNA, Logic Pro, Pro Tools, Cubase, Ableton Live, and more
• Included: UAD Analog Classics Pro plug-in bundle (80+)