Universal Audio Apollo x6 Rack-Mountable Thunderbolt 3 Audio Interface with Real-Time UAD Processing


  • HEXA Core processing
  • Two Unison enabled microphone preamps
  • Includes Realtime Analog Classics Plus plugin bundle
  • Widest dynamic range and lowest signal to noise ratio available

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Product Description

Elite-class audio conversion with new HEXA core processing. The Universal Audio Apollo X6 Thunderbolt 3 Audio Interface boasts class-leading conversion and outstanding audio fidelity.
The Apollo X6 offers two pristine-sounding Unison microphone preamps, delivering the wide dynamic range and lowest signal to noise ratio available. Track and mix with precision thanks to the new powerful new HEXA core processing, providing you with six onboard UAD DSP chips. The 16 x 22 Thunderbolt 3 audio interface comes complete with Realtime Analog Classic Plus UAD plug-in bundle, featuring a wide range of high-end emulation plugins.

Elite, class-leading audio conversion

The Apollo X6 one of the latest additions to Universal Audio’s revered Apollo series. The Apollo interface series is renowned for its exceptional audio fidelity and class-leading audio conversion. The Apollo X6 builds on this by incorporating new realtime UAD HEXA core processing. It delivers elite-class audio conversion as well as the ability to record with near-zero latency through the included preamp emulations.

The custom A/D and D/a converters provide high-end 24-bit/192kHz audio fidelity. The all-new analog circuitry delivers exceptional sound reproduction providing pristine sound. The interface provides 129 dB dynamic range and -118 dB THD+N, making it perfect for a wide range of sound sources. The 26 x 22 interface includes two Unison enabled mic preamps as well as switchable headroom settings for pro-level studio gear.

Two unison microphone preamps provide pristine sound

Universal Audio’s Unison microphone preamp technology delivers exceptional sound reproduction with strict attention to detail. The Unison technology allows you to use your Unison-enabled mic preamp simulations with your microphone. The Unison technology allows you to faithfully recreate the sweet tones of classic studio gear and preamps.

Realtime UAD HEXA core processing

The Apollo X6 features all-new HEX Core processing. This unique technology utilises six DSP chips providing up to percent more UAD plugin processing power than previous Apollo interfaces. This gives you the ability to run more UAD plugins simultaneously.
The UAD plugins available provide realtime processing of your sound sources. They span from classic recreations of Pultec EQs to cutting-edge preamp emulations. This takes your recording capabilities to the next level allowing you to achieve rich, three-dimensions analog sound.

Analog classic plus UAD plug-in bundle

The Apollo X6 comes complete with he Realtime Analog Classic Plus plug-in bundle. This bundle includes faithful recreations of classic outboard gear including authentic emulations of the Teletronix LA-2A, 1176LN and Fairchild compressors. It also boasts guitar and bass amp emulations form Marshall and Ampeg for classic-sounding instrument tones. The bundle provides you with definitive emulations of the most iconic analog signal processors in recording history.
Additional UAD plugins are available from a versatile library of exclusive emulations. The emulations span some of the most iconic outboard gear and signal processors. The meticulously crafted emulations are designed to sound and react like the hardware they are based on. It virtually gives you a studio full of iconic analog gear in a single rackspace.

Surround sound monitoring and +24dBu operation

The interface also provides comprehensive support for 5.1 surround sound, ideal for audio/visual work. This is ideal for sound engineers and producers working on audio and music for TV, video games and more. It also includes selectable +24 dBu operation for compatibility with mixing consoles and high-end pro audio equipment. It also features integrated talkback and built-in cues for communicating with artists.

Build a networked studio system

One of the most unique features of the interface, is the ability to combine up to four Apollo and six UAD-2 devices. This opens up a whole new world of possibilities when it comes to high-end studio projects. The interface features two integrated Thunderbolt 3 ports, which are backwards-compatible with Thunderbolt 1 and 2 macs**. This can grow your processing power, adding fast high-bandwidth I/O and DSP as your setup grows.

Ergonomic design, versatile connectivity

The robust and rack-mountable design only takes up a single rack space within your setup. This powerful interface works great as a centrepiece for any professional studio, with illuminated controls for low-light studio sessions. The front of the interface features two Hi-Z instrument inputs located next to the large Preamp volume control.
The front-panel also features built-in buttons for enabling/disabling features and parameters. Buttons included allow you to turn on the Phantom Power, Pad, enable the high-pass filter and switch between inputs. There is also a crisp, detailed monitoring panel on the front which displays all the information about your volume levels, inputs and sample rate.
The rear of the Apollo x6 features six outputs for surround sound as well as dual main monitor outputs. Six line inputs are also included as well as two XLR microphone inputs. In addition to the the two Thunderbolt 3 connections, the rear features S/PDIF connectivity, Word Clock and the ADAT S/MUX connectivity.


Work the way you want with LUNA technology. Universal Audio built their DAW, LUNA, from the ground up. Their aim, was to bring audio recording into a new era. Following a high-quality range of vintage emulations and innovative plugins, it is obvious that Universal Audio don’t settle for second best and strive to give you their all. LUNA is no exception. You’ll be free to integrate your favourite DSP powered plugins when recording, completely free of latency. Thanks to accelerated real time modelling, you’ll also be provided with analog style recording and overdubbing via your Apollo’s on-board DSP acceleration.
Hark back to the golden age of recording, with Neve summing from the iconic 80’s series console. You’ll be able to add warmth and richness to your tracks, from the very series of desk that is associated with seminal albums from the likes of Nirvana, Dire Straits, and Pink Floyd. The Studer A800 Tape Recorder extension allows you to add the warmth and punch associated with magnetic tape, introducing various levels of harmonics and saturation into your signal flow. With a highly realistic Steinway Model B piano, Moog Minimoog emulation, a wide array of premium samples from Spitfire Audio, and unlimited track count. You’ll have nothing holding you back from making the greatest sounding records of your life.

What's in the box

  • HEXA Core processing
  • Two Unison enabled microphone preamps
  • Includes Realtime Analog Classics Plus plugin bundle
  • Widest dynamic range and lowest signal to noise ratio



Host Connection1 x USB Type-C (Thunderbolt 3)
Analog I/O2 x 1/4" TS Hi-Z Input 6 x 1/4" TRS Line Input 2 x XLR 3-Pin Mic Input 2 x 1/4" TRS Headphone Output 2 x 1/4" TRS Monitor Output 6 x 1/4" TRS Line Output
Digital I/O1 x BNC Input (Word Clock) 1 x BNC Output (Word Clock) 1 x RCA Coaxial S/PDIF Input 1 x RCA Coaxial S/PDIF Output 2 x TOSLINK ADAT / S/MUX Input 2 x TOSLINK ADAT / S/MUX Output


Frequency ResponseHeadphone Outputs: 20 Hz to 20 kHz ±0.05 dB Hi-Z Inputs: 20 Hz to 20 kHz ±0.04 dB Line Inputs: 20 Hz to 20 kHz ±0.05 dB Line Outputs: 20 Hz to 20 kHz ±0.07 dB Mic Inputs: 20 Hz to 20 kHz ±0.05 dB Monitor Outputs: 20 Hz to 20 kHz ±0.06 dB
Gain/Trim RangeInputs: +10 to +65 dB
Max Input LevelHi-Z Inputs: +12.4 dBu Line Inputs: +24 dBu Mic Inputs: +26 dBu (with Pad)
Max Output LevelLine Outputs: +24 dBu Monitor Outputs: +24 dBu
Headphone Output Power150 mW into 300 Ohms
Dynamic RangeOutputs: 125 dBA Hi-Z Inputs: 121 dBA Line Inputs: 123 dBA Line Outputs: 27 dBA Mic Inputs: 122 dBA Monitor Outputs: 129 dBA
ImpedanceHi-Z Inputs: 1 Megohm Line Inputs: 10 Kilohms Line Outputs: 100 Ohms Mic Inputs: 5.5 Kilohms Monitor Outputs: 100 Ohms Word Clock: 75 Ohms
THD+NHeadphone Outputs: -102 dB / 0.0008% Hi-Z Inputs: -111 dB / 0.00028% Line Inputs: -113 dB / 0.00022% Line Outputs: -119 dB / 0.00011% Mic Inputs: -114 dB / 0.0002% Monitor Outputs: -118 dB / 0.00012%

Digital Audio

Sample RatesUp to 192 kHz
Bit Depth24-Bit (AD/DA Conversion)
Latency1.1 ms at 96 kHz (Input to Output)


OS CompatibilitymacOS 10.10 macOS 10.11 macOS 10.12 macOS 10.13 Windows 10
Processor RequirementIntel Core i7
Storage Requirements6 GB
Required HardwareAvailable Thunderbolt 3 Port Thunderbolt Cable (Not Included)
Internet ConnectionRequired for Registration and Software/Driver Download


AC Input Power100 to 240 VAC, 50/60 Hz
AC/DC Power Adapter12 VDC at 6 A (Included)
Power Consumption30 W (Typical) 72 W (Maximum)


Operating Temperature32 to 104°F / 0 to 40°C
Dimensions19 x 13.5 x 1.8" / 48.3 x 34.3 x 4.5 cm (Including Controls and Protrusions)
Weight9.0 lb / 4.1 kg

Packaging Info

Package Weight16.45 lb
Box Dimensions (LxWxH)23 x 16.5 x 6.8"

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