Apollo x4 Gen 2 Studio +

Desktop Apollo Recording
Create and mix with a powerful desktop Apollo interface built for serious studio work.

Four Unison Preamps
Record vocals, guitars, synths, and more through rich analog-style preamp sounds.

Realtime UAD Processing
Track through UAD plug-ins while you record, so performers hear polished studio sound in the moment.

UAD Analog Classics Pro Included
Get 80+ UAD plug-ins with the Studio+ version, including classic compressors, EQs, preamps, reverbs, tape, guitar amps, and LUNA extensions.

Apollo Monitor Correction
Mix with more confidence using monitor and headphone correction powered by Sonarworks.

Auto-Gain
Set input levels quickly and stay focused on the performance instead of the setup.

UAD Console Workflow
Control routing, monitoring, cue mixes, and plug-in scenes from the UAD Console app.

Bass Management
Add a subwoofer to your setup and hear low-end detail more clearly.

Expandable Studio Setup
Grow your system by connecting additional Apollo interfaces as your studio needs expand.

General Specifications
Device Type: Desktop Thunderbolt 3 audio interface
Edition: Studio+
Included Plug-In Suite: 80+ UAD Analog Classics Pro
Simultaneous I/O: 12 x 18
DSP Processing: QUAD Core
Audio Resolution: 24-bit / 192 kHz
Analog Round-Trip Latency: 1.1 ms at 96 kHz
Realtime Processing: UAD plug-ins via onboard DSP
Host Compatibility: Mac, Windows
DAW Compatibility: LUNA, Logic Pro, Pro Tools, Cubase, Ableton Live, VST, AU, AAX 64

Inputs
Microphone Inputs: 4 x XLR combo
Line Inputs: 4 x 1/4" TRS combo
Hi-Z Instrument Inputs: 2 x 1/4" TS
Digital Inputs: 1 x optical TOSLINK
Digital Input Formats: ADAT, S/PDIF
Maximum Digital Input Channels: 8 via ADAT
Preamp Type: Digitally controlled analog
Unison Preamps: 4
Mic Preamp Gain Range: +10 dB to +65 dB
Hi-Z Gain Range: +10 dB to +65 dB
Line Input Gain Range: +10 dB to +65 dB
Mic Input Dynamic Range: 123 dB A-weighted
Line Input Dynamic Range: 124 dB A-weighted
Hi-Z Input Dynamic Range: 122 dB A-weighted
Mic Maximum Input Level: 25 dBu with pad
Line Maximum Input Level: 20.2 dBu
Hi-Z Maximum Input Level: 12.4 dBu
Mic Input Impedance: 5.4 kΩ
Line Input Impedance: 10 kΩ
Hi-Z Input Impedance: 1 MΩ
Phantom Power: +48V per mic input
Pad: 20 dB per mic input
Low Cut Filter: 75 Hz
Polarity Inversion: Per input
Stereo Linking: Input channels 1+2 or 3+4

Outputs
Monitor Outputs: 2 x 1/4" TRS
Line Outputs: 4 x 1/4" TRS
Headphone Outputs: 2 x 1/4" TRS stereo
Digital Outputs: 1 x optical TOSLINK
Digital Output Formats: ADAT, S/PDIF
Maximum Digital Output Channels: 8 via ADAT
Monitor Output Dynamic Range: 129 dB A-weighted
Line Output Dynamic Range: 128 dB A-weighted
Headphone Output Dynamic Range: 124 dB A-weighted
Monitor Maximum Output Level: 20.2 dBu
Line Maximum Output Level: 20.2 dBu at +4 dBu reference
Line Maximum Output Level: 14.5 dBu at -10 dBV reference
Headphone Maximum Output Level: 15.4 dBu at 300 Ω
Headphone Maximum Output Level: 15.8 dBu at 600 Ω
Headphone Maximum Output Power: 69 mW at 300 Ω
Headphone Maximum Output Power: 38 mW at 600 Ω
Output Coupling: DC coupled

Digital Audio
Thunderbolt Port: 1 x Thunderbolt 3
Optical Ports: 1 input, 1 output
Optical Connector: TOSLINK JIS F05
S/PDIF Channels: 2 input, 2 output
S/PDIF Sample Rates: 44.1, 48, 88.2, 96 kHz
ADAT Channels: Up to 8 input, 8 output
ADAT Format: ADAT Lightpipe with S/MUX
ADAT Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192 kHz
ADAT Channels at 44.1 / 48 kHz: 8
ADAT Channels at 88.2 / 96 kHz: 4
ADAT Channels at 176.4 / 192 kHz: 2
Clock Sources: Internal, ADAT, S/PDIF

Monitoring
Monitor Controller: Integrated
Monitor Controls: Level, mute, dim, mono, alternate speakers, talkback
Talkback Microphone: Built-in
Monitor Correction: Apollo Monitor Correction powered by Sonarworks
Bass Management: Supported
Immersive Audio Monitoring: Supported
Cue Mixes: Supported
Headphone Volume Control: Independent

Software
Control Application: UAD Console
Console Features: Auto-Gain, Plug-In Scenes, Bass Management, Monitor Correction, Immersive Audio
Console Recall: Supported
UAD Meter & Control Panel: Supported
Virtual I/O: Supported
Auxiliary Buses: 2 stereo
Plug-In Library Access: 200+ UAD plug-ins
Native and DSP Workflow: Hybrid DSP and host processing

Included UAD Analog Classics Pro Plug-Ins
Vocals & Pitch Correction: 2
Channel Strips & Preamps: 19
Compressors / Limiters: 21
Equalizers: 9
Special Processing: 9
Instruments: 1
Delay & Modulation: 8
Reverbs & Rooms: 6
Mastering: 3
Guitar & Bass: 9
LUNA Extensions: 4

Power
Power Supply: External AC-to-DC
AC Input Connector: IEC C8
AC Requirements: 100V–240V AC, 50–60 Hz, 1.2 A max
DC Connector: 2.1 mm x 5.5 mm center-positive barrel
DC Requirements: 12 VDC, 4.2 A
Maximum Power Consumption: 19 W

Physical
Width: 9.17" / 232.98 mm
Height: 2.51" / 65.81 mm
Depth: 5.87" / 149.13 mm
Depth with Protrusions: 6.12" / 155.60 mm
Weight: 3.2 lb / 1.47 kg
Operating Temperature: 32°F to 104°F / 0°C to 40°C
Security Slot: Kensington