Universal Audio Apollo Twin X DUO Thunderbolt 3 Desktop Audio Interface

SKU: APLTWXD Category:

The Universal Audio Apollo Twin X DUO is a desktop Thunderbolt 3 audio interface with real-time UAD processing designed for high-resolution recording and mixing for musicians, producers, and audio engineers in mobile production rigs and project studios.

Key Features

  • High-Speed Thunderbolt 3 Host Connection
  • DUO Core Realtime UAD Processing
  • 2 x Unison-Enabled Mic Preamps
  • 1 x 1/4″ Hi-Z Input and Optical Input

Call for Price

The Universal Audio Apollo Twin X DUO is a desktop Thunderbolt 3 audio interface with real-time UAD processing designed for high-resolution recording and mixing for musicians, producers, and audio engineers in mobile production rigs and project studios. Delivering the sound, feel, and flow of analog recording with low distortion and an immense D/A dynamic range of 127 dB, this 10 x 6 interface combines versatile inputs and outputs, a hearty plug-in bundle, and powerful UAD-2 DUO Core processing.

Designed to perform a central role in a modern studio, the Apollo Twin X DUO offers elite-class conversion akin to the Apollo X rackmount interfaces plus an array of analog and digital I/O. The interface features two XLR-1/4″ combo inputs and a 1/4″ Hi-Z input, all with Unison integration for UAD emulations of classic analog preamps. Each analog input boasts a switchable low-cut filter, 48V phantom power, pad, polarity inversion, and stereo linking. Digital connectivity includes a TOSLINK optical input for easy connection to external preamps with ADAT or S/PDIF optical outputs.

The built-in DUO Core processing allows you to monitor and record audio using classic analog emulations with near-zero latency. The included Realtime Analog Classics plug-in bundle empowers you with 14 plug-ins ranging from compressors and EQs to virtual guitar/bass amps and time-based processors. 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. Core Audio and Windows drivers ensure compatibility with all major DAWs including Pro Tools, Logic Pro, Cubase, Live, and more.

The Apollo Twin X DUO 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 front-panel headphone output, two 1/4″ line outputs are available for connection to power amps or active monitors. A total of four Apollo interfaces and six total UAD-2 devices can be combined, allowing Thunderbolt users the ability to expand their I/O and DSP.

General Features

  • Track, overdub, and mix with high-resolution A/D-D/A conversion and DSP-powered plug-ins
  • Integrated talkback and cues for easy communication and slate functionality
  • Built-in monitor controller with monitor remote functions and mono, mute, dim, and alt monitor controls
  • Comprehensive front-panel metering and controls
  • Unison technology provides models of classic tube and transformer-based mic preamps and guitar amps
  • UAD-2 DUO Core processing for tracking through models of vintage compressors, EQs, tape machines, mic preamps, and guitar amps with near-zero latency
  • Convenient desktop form factor
  • High-speed Thunderbolt 3 connectivity for Mac and Windows computers (Thunderbolt cable available separately)
  • Free, industry-leading phone/online technical support from knowledgeable audio engineers

Versatile I/O

  • 10 x 6 audio interface with two Unison-enabled microphone preamps, providing emulations of classic analog preamps with near-zero latency
  • One front-panel, Unison-enabled 1/4″ Hi-Z input for direct connection of a guitar, bass, or keyboard
  • Two XLR-1/4″ combo mic/line inputs
  • Stereo 1/4″ monitor output and one 1/4″ headphone output, each with dedicated level control
  • Two 1/4″ line-level outputs (may be used for alternate monitor outputs)
  • Up to eight channels of additional input via one TOSLINK ADAT optical port (may alternatively be used for stereo S/PDIF)


  • 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 Twin X DUO as a desktop monitor controller with additional I/O and DSP power

Powered Plug-Ins

  • Includes Realtime Analog Classics plug-in bundle, which supports VST, RTAS, Audio Units, and AAX 64-bit for compatibility with all major DAWs
  • UA 610-B Tube Preamp and EQ
  • Marshall Plexi Classic Guitar Amp
  • Ampeg SVT-VR Classic Bass Amp
  • UA 1176LN Limiting Amplifier (Legacy)
  • UA 1176SE Limiting Amplifier (Legacy)
  • Pultec EQP-1A EQ (Legacy)
  • Pultec Pro EQ (Legacy)
  • Teletronix LA-2A Leveling Amplifier (Legacy)
  • Raw Distortion
  • 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)
  • RealVerb Pro Custom Room Modeler


Channels of I/O

2 Inputs / 6 Outputs at 192 kHz
8 Inputs / 0 Outputs at 48 kHz
4 Inputs / 0 Outputs at 96 kHz
2 Inputs / 0 Outputs at 192 kHz

Max Sample Rate/Resolution

192 kHz / 24-Bit

Display and Indicators

2 x Multi-Segment LED Meters (Input Level)
2 x Multi-Segment LED Meters (Output Level)
1 x Multi-Segment LED Meter (Multifunction)
1 x LED (High-Pass Filter)
1 x LED (+48V)
1 x LED (Pad)
1 x LED (Dim)
1 x LED (Monitoring Mode)
1 x LED (Mono)
1 x LED (Mute)


Host Connection

1 x Thunderbolt (MDP) (Thunderbolt 3)

Analog I/O

2 x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line Input
1 x 1/4" TS Unbalanced Hi-Z Input
2 x 1/4" TRS Balanced/Unbalanced Monitor Output
2 x 1/4" TRS Balanced/Unbalanced Line Output
1 x 1/4" TRS Unbalanced Headphone Output

Phantom Power

+48 V (Selectable on Individual Inputs)

Digital I/O




Memory Card Slot



Frequency Response

Line Outputs, Mic/Line/Hi-Z Inputs:
20 Hz to 20 kHz ±0.05 dB
Headphone Outputs, Monitor Outputs:
20 Hz to 20 kHz ±0.1 dB

Gain/Trim Range

Mic/Line/Hi-Z Inputs:
+10 dB to +65 dB

Max Input Level

Mic Inputs:
25.6 dBu (with Pad)
Hi-Z Inputs:
12.2 dBu (Min Gain)
Line Inputs:
20.2 dBu (Min Gain)

Max Output Level

Line Outputs, Monitor Outputs:
20.2 dBu

Headphone Output Power

96 mW into 300 Ohms (Max)

Dynamic Range

Mic Inputs:
123 dBA
Hi-Z Inputs:
121 dBA
Line Inputs:
122 dBA
Line Outputs:
126 dBA
Monitor Outputs:
127 dBA
Headphone Outputs:
124 dBA


Mic Inputs:
5.5 Kilohms
Hi-Z Inputs:
1 Megohm
Line Inputs:
10 Kilohms
Line Outputs:
100 Ohms
Monitor Outputs:
100 Ohms


Mic Inputs:
-115 dB
Hi-Z Inputs:
-108 dB
Line Inputs:
-114 dB
Line Outputs:
-117 dB
Monitor Outputs:
-117 dB
Headphone Outputs:
-98 dB

Digital Audio

Sample Rates

Up to 192 kHz (AD/DA Conversion)

Bit Depth

24-Bit (AD/DA Conversion)


1.1 ms at 96 kHz (Input to Output)

Sync Sources

ADAT, Internal, S/PDIF


OS Compatibility

macOS 10.12
macOS 10.13
macOS 10.14
Windows 10

Processor Requirement

Intel Core i7

Storage Requirements

6 GB

Required Hardware

Available Thunderbolt 3 Port
Thunderbolt 3 Cable (Not Included)

Internet Connection

Required for Registration, Software/Driver Download


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

15 W (Maximum)


Operating Temperature

32 to 104°F / 0 to 40°C


Anti-Theft Features

Kensington Security Slot


6.31 x 6.2 x 2.6" / 16.03 x 15.75 x 6.6 cm


2.4 lb / 1.1 kg (Without Accessories)

Packaging Info

Package Weight

4.35 lb

Box Dimensions (LxWxH)

11.1 x 9.5 x 7.5"

  • Universal Audio Apollo Twin X DUO Thunderbolt 3 Desktop Audio Interface with Real-Time UAD Processing
  • External Power Supply