UNIVERSAL AUDIO / APOLLO X4 Audio Interface Thunderbolt 3

Apollo x4 is a 12-in/18-out audio interface equipped with carefully selected A/D and D/A converters and four Unison mic preamps. Boasting a 127 dB D/A rating, it delivers audio quality on your desktop that rivals professional models.

■Audio Interface
■Thunderbolt 3 Connection
■Includes Realtime Analog Classics Plus Plug-in Bundle
Please carefully check the Thunderbolt 3 specifications and minimum operating environment

■Apollo x4 Product Overview
Designed and manufactured based on Universal Audio's 60-year tradition of audio craftsmanship, the Apollo x4 is a new style of desktop audio interface. With 127dB D/A dynamic range and a bundle of UAD analog emulation plug-ins, it brings a premium analog studio to your desktop.

It comes with the ""Realtime Analog Classics Plus"" bundle, featuring classic UAD plug-ins like the UA 610-B Tube Preamp & EQ, Teletronix LA-2A, 1176 Compressor, Marshall Plexi Classic Guitar Amp, Ampeg SVT-VR Classic Bass Amp, and Pultec EQ, so you're ready to go for recording, mixing, and mastering.

To create the definitive desktop audio interface for this new-style 12-in/18-out interface, Universal Audio engineers redesigned the audio converters. The result: 127 dB dynamic range and -117 dB THD+N, achieving a sound quality comparable to that of dedicated D/A converters.

Apollo x4 Key Features
- Desktop 12-in/18-out Thunderbolt 3 audio interface for Mac and Windows
- Carefully selected A/D and D/A converters inherited from the Apollo X rackmount model
- Four Unison mic preamps provide stunning modeling of classic tube and transformer-based mic preamps and guitar amps
- UAD-2 Quad Core processing enables near-latency tracking with vintage compressors, EQs, tape machines, mic preamps, and guitar amp plug-ins
- Two front-panel Unison-enabled Hi-Z inputs
- Two front-panel headphone outputs
- Built-in talkback mic for seamless communication with in-studio musicians
- Monitor remote functionality, mono, mute, DIM, and ALT monitor controls
- Up to eight channels of expanded digital input via optical ADAT/SPDIF inputs and outputs
- Teletronix Includes the ""Realtime Analog Classics Plus"" UAD plug-in bundle, featuring the LA-2A, 1176 Compressor, Pultec EQ, UA 610-B Tube Preamp & EQ, and more.*
- VST, RTAS, and AAX 64 compatibility lets you use UAD Powered Plug-Ins with major DAWs.
- Uncompromising analog circuit design, superior components, and premium build quality.

■ The Apollo Twin x4 includes the ""Realtime Analog Classics Plus"" plug-in bundle. Other UAD plug-ins are available separately from the UA Store.

■Includes Realtime Analog Classics Plus bundle

■Key Specifications
(Unless otherwise noted, 48 kHz internal sample rate, 24-bit, 20 kHz bandwidth, balanced inputs and outputs)

A/D D/A Conversion
Supported Sample Rates (kHz): 44.1, 48, 88.2, 96, 176.4, 192
Bit Rate: 24
A/D Conversion Channels: 4
D/A Conversion Channels: 10
Analog Signal Round-Trip Latency: 1.1 mSec @ 96 kHz Sampling Rate
Analog Signal Round-Trip Latency (with four UAD plug-ins inserted in series in the Console application): 1.1 mSec @ 96 kHz Sample Rate

Analog Inputs:
・Mic In 1-4 (Combo Jack, XLR Female Balanced, 2-Pin Hot)
・Phantom Power: +48 V (On/Off for Each Mic Input)
・Frequency Response: 20 Hz - 20 kHz (±0.05 dB)
Dynamic Range: 123 dB (A-Weighted)
THD + N: -115 dB (1 kHz @ -1 dBFS)
Default Input Impedance: 5.5 kΩ (variable via Unison plug-in)
Gain Range: +10 dB to +65 dB
Pad Attenuation (on/off for each mic input): 20 dB (variable via Unison plug-in)
Maximum Input Level (Pad on): +25.6 dBu

Hi-Z In 1 & 2 (1/4"" female TS unbalanced)
Frequency Response: 20 Hz to 20 kHz (±0.05 dB)
Dynamic Range: 122 dB (A-Weighted)
THD + N: -108 dB (1 kHz @ -1 dBFS)
Default Input Impedance: 1 MΩ (variable via Unison plug-in)
Gain Range: +10 dB to +65 dB
Maximum Input Level: +12.2 dBu

- Line In 1 - 4 (Combo Jack, 1/4"" Female TRS Balanced)
Frequency Response: 20 Hz to 20 kHz (±0.05 dB)
Dynamic Range: 122 dB (A-Weighted)
THD+N: -114 dB (1 kHz @ -1 dBFS)
Input Impedance: 5 kΩ
Gain Range: +10 dB to +65 dB
Maximum Input Level: +20.2 dBu

Analog Output:
- Line Out 1 - 4 (1/4"" Female TRS Balanced)
Frequency Response: 20 Hz to 20 kHz (±0.05 dB)
Dynamic Range: 127 dB (A-Weighted)
THD+N: -117 dB (1 kHz @ -1 dBFS)
Output Impedance: 100 Ω
Maximum Output Level: +20.2 dBu

Monitor Outs L & R (1/4"" Female TRS Balanced)
Frequency Response: 20 Hz to 20 kHz (±0.1 dB)
Dynamic Range: 127 dB (A-Weighted)
THD+N: -116 dB
Output Impedance: 100 Ω
Maximum Output Level: +20.2 dBu

Stereo Headphone Outs 1 & 2 (1/4"" Female TRS Stereo)
Frequency Response: 20 Hz to 20 kHz (±0.1 dB)
Dynamic Range: 124 dB (A-Weighted)
THD+N: -98 dB (1 kHz @ -1 dBFS)
Maximum Output Power: 96 mW RMS (300 Ω load)

Digital I/O:
・S/PDIF (shared with Optical Toslink and ADAT)
　Format: IEC958
　Supported Sample Rates (kHz): 44.1, 48, 88.2, 96
　Number of Channels: 2 (Stereo L/R)

・ADAT (shared with Optical Toslink and S/PDIF)
　Format: ADAT Lightpipe (S/MUX supported)
　Supported Sample Rates (kHz): 44.1, 48, 88.2, 96, 176.4, 192
　Number of Channels @ 44.1 kHz, 48 kHz: 1-8
　Number of Channels @ 88.2 kHz, 96 kHz: 1-4
　Number of Channels @ 176.4 kHz, 192 kHz: 1-2

Clock Source: Internal, S/PDIF, ADAT
(External clock synchronization is selected depending on the connected source)
Power: Dedicated power supply included (Input: 100-240V AC, 50/60 Hz; Output: 12V DC)
Maximum power consumption: 19 W
Dimensions: 233.0 x 66.0 x 151.1 mm (W x H x D) *excluding protrusions
Weight: 1.07 kg

■Apollo x4 (v9.10.2) Minimum System Requirements
[Macintosh Computer]
- Thunderbolt 1, 2, or 3 port*
- macOS 10.12 Sierra, 10.13 High Sierra, or 10.14 Mojave
*For Thunderbolt 1 or 2, an Apple Thunderbolt 3 to Thunderbolt 2 adapter (sold separately) is required.

[Windows Computer]
- Thunderbolt 3 (USB-C port) connector
- 64-bit version of Windows 10

[Requirements]
- At least 6GB of free hard disk space
- Internet connection (for software installation, product registration, and additional plug-in purchases)
- Host application compatible with VST, Audio Units, RTAS, or AAX 64 plug-ins
*Thunderbolt 3 cable and Thunderbolt 3 to Thunderbolt 2 adapter sold separately.
*Quad Core i7 or higher processor recommended.

*For the latest system requirements, please refer to the manufacturer's website.