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 is comparable to professional models.

■Audio interface
■Thunderbolt 3 connection
■Realtime Analog Classics Plus plug-in bundle included
Please check Thunderbolt 3 specifications and minimum operating environment carefully

■Apollo x4 product overview
A new style desktop audio interface Apollo x4, designed and produced based on Universal Audio's 60+ years of tradition of audio craftsmanship, provides a top-class analog studio on your desktop with a 127dB D/A dynamic range and a bundle of UAD analog emulation plug-ins.

The ""Realtime Analog Classics Plus"" bundle, which includes a number of classic UAD plug-ins, UA 610-B Tube Preamp & EQ, Teletronix LA-2A, 1176 Compressor, Marshall Plexi Classic Guitar Amp, Ampeg SVT-VR Classic Bass Amp, Pultec EQ, and more, is included, so you can use it immediately for recording, mixing, and mastering.

In order to make this new style 12-in/18-out audio interface the definitive desktop version, Universal Audio engineers redesigned the audio converters. As a result, they achieved a dynamic range of 127 dB and a THD+N of -117 dB, achieving a sound quality that rivals that of a dedicated D/A converter. ■Main features of Apollo x4
- Desktop type, 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 allows you to track with vintage compressors, EQs, tape machines, mic preamps, and guitar amp plug-ins with near-zero latency
- Two Unison-enabled Hi-Z inputs on the front panel
- Two headphone outputs on the front panel
- Built-in talkback microphone for smooth communication with musicians in the studio
- Features include monitor remote function, mono, mute, DIM, and ALT monitor control
- Up to 8 channels of expansion digital input via optical ADAT/SPDIF inputs and outputs
- Teletronix LA-2A, 1176 compressor, Pultec EQ, UA Includes the ""Realtime Analog Classics Plus"" UAD plug-in bundle, including the 610-B Tube Preamp & EQ.*

- Compatible with VST, RTAS, and AAX 64, and UAD Powered Plug-ins can be used 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 sold separately at the UA Store.

■Includes Realtime Analog Classics Plus bundle

■Main specifications
(Unless otherwise specified, 48 kHz internal sample rate, 24-bit, 20 kHz bandwidth, input and output are balanced)

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 (4 UAD plug-ins inserted in series in 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 (can be turned on/off for each microphone input)
Frequency response: 20 Hz to 20 kHz (±0.05 dB)
Dynamic range: 123 dB (A-Weighted)
THD + N: -115 dB (1 kHz @-1 dBFS)
Initial input impedance: 5.5 kΩ (variable with Unison plug-in)
Gain range: +10 dB to +65 dB
Pad attenuation (can be turned on/off for each microphone input): 20 dB (variable with 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)
Initial input impedance: 1 MΩ (variable with 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 Outputs:
・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 Out 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: 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 light pipe (S/MUX support)

Supported sample rates (kHz): 44.1, 48, 88.2, 96, 176.4, 192

Number of channels @44.1 kHz, 48 kHz: 1 to 8

Number of channels @88.2 kHz, 96 kHz: 1 to 4

Number of channels @176.4 kHz, 192 kHz: 1 to 2

Clock source: internal, S/PDIF, ADAT

(External clock sync is selected depending on the connected source)

Power supply: Dedicated power supply included (Input: 100 to 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) *Not including protrusions

Weight: 1.07 kg

■Minimum operating environment for Apollo x4 (v9.10.2)

[Macintosh computer]

・Thunderbolt 1, 2, or 3 connector*

・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

[Common]
-6GB or more of free hard disk space
-Internet connection (for software installation, product registration, and additional plug-in purchase)
-Host application that runs 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 operating environment, please refer to the manufacturer's website.