Poised to be the center of a project studio or highly flexible mobile rig, the Universal Audio Apollo x4 Heritage Edition desktop 12x18 Thunderbolt 3 audio interface combines the sound, feel, and flow of analog studio recording with powerful QUAD Core real-time UAD processing and a robust bundle of 34 stellar UAD plug-ins.
Furnished with elite-class 24-bit / 192 kHz conversion akin to the popular Apollo X rackmount interfaces, the Apollo x4 gives musicians, producers, songwriters, and audio engineers the appreciable value of crystal-clear, high-resolution recording and mixing with low distortion (-117 dB) and immense dynamic range (127 dB).
The interface features four XLR-1/4" mic/line combo inputs and two 1/4" Hi-Z inputs, all with Unison integration for precise UAD emulations of classic analog preamps. Impart vintage character of your choosing on microphone and instrument recordings while bypassing the unpredictable nature of old equipment.
Thanks to the switchable low-cut filter, pad, polarity inversion, 48V phantom power, and stereo linking on each analog input, you can efficiently optimize your incoming signals with straightforward buttons on the Apollo x4 s face. In addition to the four primary analog inputs, you can record up to eight more channels by connecting external preamps with ADAT or S/PDIF optical outputs to the TOSLINK optical input port on the Apollo x4. An optical output is also featured on the Apollo x4, allowing it to route up to eight channels from your DAW to a digital mixer, headphone distribution system, or external D/A converter.
The built-in QUAD Core processing allows you to monitor and record audio using classic analog emulations with near-zero latency and no burden on your computer s CPU. The plug-in bundle included with the Heritage Edition empowers you with 34 top-notch plug-ins ranging from vintage compressor and EQ collections to virtual guitar/bass amps, time-based processors, and tape emulation. The included Console application provides control and recall of all interface and UAD plug-in settings including channel-strip presets, drag-and-drop functionality, and dynamically resizable windows.
Mac and Windows drivers ensure compatibility with all major DAWs including Pro Tools, Logic Pro, Cubase, Ableton Live, and more. The interface also integrates seamlessly with LUNA, Universal Audio s free Mac-based, single-window recording system with unlimited track counts and full Audio Units plug-in support.
The Apollo x4 offers a comprehensive monitor section with talkback functionality and dedicated front-panel controls for Alt Speakers, Dim, and Mono functions, as well as input and output metering capabilities. In addition to the dedicated stereo monitor feed and two front-panel headphone outputs (great for handling multiple cue mixes), four 1/4" line outputs are available for connection to a second set of monitors and outboard processors.
At any point, you can increase the power and capability of the Apollo x4 through integration of qualified Universal Audio hardware. Up to four Apollo interfaces and six total UAD-2 devices can be combined, allowing Thunderbolt users the ability to expand their I/O and DSP without abandoning the Apollo x4. The Thunderbolt 3 port is backward compatible with Thunderbolt 1 and 2 via a qualified adapter (available separately).
Heritage Edition
The Heritage Edition features the same Apollo x4 interface found in the standard edition but with more plug-ins. The standard Apollo x4 includes the Realtime Analog Classics Plus bundle (16 plug-ins), and the Heritage Edition adds 18 more plug-ins for a total of 34 revered UA-powered plug-ins.
The Power of Apollo
- Track, overdub, and mix with high-resolution AD/DA conversion and DSP-powered plug-ins
- QUAD Core UAD processing for tracking through models of vintage compressors, EQs, tape machines, mic preamps, and guitar amps, with near-zero latency and no burden on your computers CPU
- Unison technology nails the tone of sought-after tube and solid-state mic pres including their input impedance, gain-stage sweet spots, and the component-level circuit behaviors of the original hardware
- High-speed Thunderbolt 3 connectivity for Mac and Windows computers (Thunderbolt cable available separately)
- Convenient desktop form factor with reliable AC powering (external power supply included)
- Free, industry-leading phone/online technical support from knowledgeable audio engineers
I/O for the Studio
- 12x18 audio interface with four Unison-enabled microphone preamps (via XLR-1/4" combo mic/line inputs), providing emulations of classic analog preamps with near-zero latency
- Two front-panel, Unison-enabled 1/4" Hi-Z inputs for direct connection of guitars, basses, or keyboards
- Stereo 1/4" monitor output and two independent 1/4" headphone outputs, each with adjustable level
- Four additional 1/4" line-level outputs, may be used for alternate monitor outputs or analog outboard processors
- Add up to eight extra input channels via one TOSLINK optical ADAT port (may alternatively be used for stereo S/PDIF)
- TOSLINK optical output supports ADAT or S/PDIF format for sending up to eight channels from your DAW to a digital mixer, headphone distribution system, or external D/A converter
Pro-Level Workflow
- Built-in monitor controller with monitor remote functions and mono, mute, dim, and alt monitor controls
- Integrated talkback and cues for easy communication and slate functionality
- Comprehensive front-panel metering and fast, intuitive controls, no menu-diving required
Expandable I/O and DSP
- Cascade up to four Thunderbolt-equipped Apollo interfaces and six UAD-2 Thunderbolt devices for expanded I/O and DSP
- Expand your studio with an Apollo X rackmount unit (available separately), so you can use your Apollo x4 as a desktop monitor controller with additional I/O and DSP power
- Backward-compatible with Thunderbolt 1 and 2 via a qualified adapter (available separately)
34 Powered Plug-Ins
Includes Realtime Analog Classics Plus plug-in bundle plus 18 additional plug-ins to complete the compressor, EQ, and preamp collections and provide tape emulation and another reverb (plug-ins support VST, RTAS, Audio Units, and AAX 64-bit for compatibility with all major DAWs):
- UA 610-A Tube Preamp and EQ (Vintage)
- UA 610-B Tube Preamp and EQ (Modern)
- Marshall Plexi Classic Guitar Amp
- Ampeg SVT-VR Classic Bass Amp
- UA 1176LN Limiting Amplifier (Legacy)
- UA 1176SE Limiting Amplifier (Legacy)
- UA 1176 Classic Limiter Collection (1176LN Rev E, 1176 Rev A, and 1176AE 40th Anniversary Edition)
- Pultec EQP-1A EQ (Legacy)
- Pultec MEQ-5 EQ (Legacy)
- Pultec Passive EQ Collection (EQP-1A, MEQ-5, and HLF-3C)
- Teletronix LA-2A Leveling Amplifier (Legacy)
- Teletronix LA-2A Classic Leveler Collection (LA-2A Silver, LA-2A Gray, and LA-2)
- Teletronix LA-3A Audio Leveler
- Helios Type 69 Preamp and EQ Collection (Helios Type 69 and Helios Type 69 Legacy)
- V76 Preamplifier
- Raw Distortion
- Fairchild 670 Compressor (Legacy)
- Fairchild Tube Limiter Collection (Fairchild 660 and Fairchild 670)
- Precision Enhancer Hz
- Precision Channel Strip (Precision Mix Rack Collection)
- Precision Reflection Engine (Precision Mix Rack Collection)
- Precision Delay Mod (Precision Mix Rack Collection)
- Precision Delay Mod L (Precision Mix Rack Collection)
- Pure Plate Reverb
- RealVerb Pro Custom Room Modeler
- UA Oxide Tape Recorder
Get Legendary UA Sound Natively with UAD Spark
- Apollo Heritage Editions include plug-ins featured in UAD Spark, UA s subscription plug-in collection that runs natively on Mac no UA hardware required
- With UAD Spark, you can expand your plug-in process
Universal Audio Rackmount x4 Specs
| Form Factor | Desktop |
| Display | 9 x Multi-Segment LED Meter |
| Channels of I/O | Analog: 4 Inputs / 10 Outputs at 192 kHz Digital: 8 Inputs / 8 Outputs at 48 kHz 4 Inputs / 4 Outputs at 96 kHz 2 Inputs / 2 Outputs at 192 kHz |
| Maximum Sampling Rate | 192 kHz / 24-Bit |
| Number of Microphone Preamps | 4 Preamps |
| Input Level Adjustment | 1 x Knob |
| Expansion Slots | None |
Signal Processing
| Pad | -20 dB (Switchable per Channel) |
| Gain/Trim Range | Mic/Line/Hi-Z Inputs: +10 dB to +65 dB |
| High-Pass Filter | 75 Hz |
| Solo/Mute | Mute per Master |
Connectivity
| Analog Audio I/O | 4 x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line Input 2 x 1/4" TRS Unbalanced Hi-Z Input 4 x 1/4" TRS Balanced/Unbalanced Line Output 2 x 1/4" TRS Balanced/Unbalanced Monitor Output 2 x 1/4" TRS Unbalanced Headphone Output |
| Phantom Power | 48 V, Selectable On/Off (Selectable on Individual Inputs) |
| Digital Audio I/O | 1 x TOSLINK Optical ADAT / S/PDIF Input (S/MUX4 Support) 1 x TOSLINK Optical ADAT / S/PDIF Output (S/MUX4 Support) |
| Host Connection / USB | 1 x USB-C |
| Host Connection Protocol | Thunderbolt 3 |
| USB (Non-Host) | None |
| Sync I/O | None |
| Network I/O | None |
| MIDI I/O | None |
| Wireless Connectivity | None |
Performance
| Frequency Response | Mic, Line, Hi-Z Inputs: 20 Hz to 20 kHz ±0.05 dB Line Outputs: 20 Hz to 20 kHz ±0.05 dB Headphone, Monitor Outputs: 20 Hz to 20 kHz ±0.1 dB |
| Maximum Input Level | Mic Inputs: 25.6 dBu (with Pad) Hi-Z Inputs: 12.2 dBu (Min Gain) Line Inputs: 20.2 dBu (Min Gain) |
| Maximum Output Level | Line/Monitor Outputs: 20.2 dBu |
| Headphone Output Power | 96 mW into 300 Ohms (Max) |
| Impedance | Mic Inputs: 5.5 Kilohms Hi-Z Inputs: 1 Megohm Line Inputs: 5 Kilohms Line Outputs: 100 Ohms Monitor Outputs: 100 Ohms |
| Dynamic Range | Mic Inputs: 123 dBA Hi-Z Inputs: 122 dBA Line Inputs: 122 dBA Line Outputs: 127 dBA Monitor Outputs: 127 dBA Headphone Outputs: 124 dBA |
| THD+N | Mic Inputs: -115 dB (1 kHz, at -1 dBFS) Hi-Z Inputs: -108 dB (1 kHz, at -1 dBFS) Line Inputs: -114 dB (1 kHz, at -1 dBFS) Line Outputs: -117 dB (1 kHz, at -1 dBFS) Monitor Outputs: -116 dB Headphone Outputs: -98 dB (1 kHz, at -1 dBFS) |
Digital Audio
| Sample Rates | Up to 192 kHz (AD/DA Conversion) |
| Sample Rate Conversion | None |
| Bit Depths | 24-Bit (AD/DA Conversion) |
| Latency | 1.1 ms at 96 kHz (Input to Output) |
| Sync Sources | ADAT, Internal, S/PDIF |
Audio Storage & Playback
| Memory Card Slot | None |
Compatibility
| OS Compatibility | macOS 10.12 macOS 10.13 macOS 10.14 macOS 10.15 Windows 10 (64-Bit Only) *As of November, 2021: Check with manufacturer for the most up-to-date compatibility |
| Included Software | LUNA Mac Only |
| Compatible Software (Not Included) | Any Core Audio (Mac) Compliant Software |
| Supported Drivers/API & Plug-Ins | Proprietary |
| Processor Requirement | Intel Core i7 |
| Storage Requirements | 6 GB |
| Mobile Device Compatibility | None |
| Required Hardware | Available Thunderbolt 3 Port Thunderbolt 3 Cable (Not Included) |
| Internet Connection | Required for Registration, Software/Driver Download |
Power
| Power Requirements | AC/DC Power Adapter (Included) |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz |
| AC/DC Power Adapter | 12 VDC, Center-Positive (Included) |
| Power Consumption | 19 W (Maximum) |
Physical
| Anti-Theft Features | Kensington Security Slot |
| Operating Temperature | 32 to 104°F / 0 to 40°C |
| Dimensions | 9.17 x 6.17 x 2.6" / 23.29 x 15.67 x 6.6 cm (Including Controls and Protrusions) |
| Weight | 3.2 lb / 1.5 kg (without Accessories) |
Packaging Info
| Package Weight | 5.69 lb |
| Box Dimensions (LxWxH) | 11.3 x 8.3 x 5.2" |
In the Box
- Universal Audio Apollo x4 Heritage Edition Thunderbolt 3 Audio Interface with UAD DSP
- External Power Supply
- 34 x UAD Plug-Ins (Download)
- LUNA Recording Software for Mac (Download)
- 2-Year Warranty
Not in the Box
- Essential Thunderbolt Cables (Not Included)
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