Thunderbolt 3 Audio Interface
Apollo x4 allows musicians and producers to easily track, overdub, and mix larger projects with elite-class A/D and D/A conversion, four Unison-enabled preamps, and QUAD Core realtime UAD plug-in processing — all in a desktop Thunderbolt 3 audio interface for Mac and Windows.
Built upon UA’s 60-year heritage of audio craftsmanship, Apollo x4 confidently outperforms everything in its class with 127 dB D/A dynamic range, along with an included bundle of UAD analog emulation plug-ins and LUNA Recording System, giving you a fully-stocked analog studio, right on your desktop.
Record and mix with elite-class A/D and D/A conversion — with the widest dynamic range and lowest noise of any desktop interface
Four Unison-enabled preamps — track larger projects with near-zero latency through preamp emulations from Helios,® Neve,® API,® Manley,® and more*
Onboard UAD QUAD Core processing lets you track and mix with the included Teletronix LA‑2A and 1176 compressors, Pultec EQs, and 610‑B Tube Preamp & EQ plug-ins
Includes LUNA Recording System — a fully-integrated and inspiring music production application
Four Unison Preamps: Get the Genuine Sound of Neve, Helios, API & More
Apollo x4 features four Unison-enabled mic preamps, letting you track through exacting mic preamp emulations from Neve, Helios, API, Manley, Avalon, Universal Audio and many more. Exclusive to UA Audio Interfaces, Unison technology nails the tone of these 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.
The secret to Unison is its hardware-software integration between Apollo’s mic preamps and its onboard UAD QUAD Core DSP Acceleration. Simply place a Unison preamp plug-in on your mic input in Apollo Console software, and it physically reconfigures the Apollo interface's impedance — so you can tap into the classic sounds of the world’s most recorded mic preamps.
Elite-Class A/D and D/A Conversion
With thousands of hit songs and hundreds of Grammy-winning albums under their belt, Apollo interfaces are used to track exceptional-sounding records every day. To improve on the previous generation of desktop Apollo interfaces’ class-leading audio conversion, UA engineers redesigned the x4’s audio conversion to deliver a striking 127 dB dynamic range and -117 dB THD+N, giving Apollo x4 a spacious, organic sound that easily rivals dedicated high-end converters.
Record with Vintage Amps
Apollo x4 also includes Unison technology on its front panel instrument inputs, giving you access to dead-on emulations of guitar and bass amps like the Fender '55 Tweed Deluxe, Marshall Plexi Super Lead 1959, and the Ampeg B-15N Bass Amplifier.
Expanded I/O and Built-in Talkback Mic
In addition to its four onboard Unison-equipped preamps, Apollo x4 offers two headphone outs and two Hi-Z instrument inputs — greatly enhancing your collaborative process. Plus, with a total of four line outs, optical ADAT/SPDIF input and output, plus dedicated monitor remote controls and a built-in Talkback mic, the 12 x 18 Apollo x4 can serve as the powerful centerpiece of your professional desktop studio.
Create with a Fast, Natural Workflow in LUNA
Explore analog sound and workflows with LUNA, UA’s Mac‑based recording application for producers and musicians, composers, sound designers, and more.
Designed for seamless integration with Apollo audio interfaces, LUNA gives your recordings big studio sound with built‑in extensions from Neve,® Studer,® and API® — plus inspiring instruments like Moog® Minimoog and Ravel grand piano.
Desktop 12 x 18 Thunderbolt 3 audio interface for Mac and Windows with elite A/D and D/A conversion inherited directly from the acclaimed Apollo X rackmount interfaces
4 Unison mic preamps offer stunning models of classic tube and transformer-based mic preamps and guitar amps
UAD-2 QUAD Core Processing for tracking through vintage compressors, EQs, tape machines, mic preamps, and guitar amp plug-ins with near-zero latency
Produce with LUNA Recording System — a fully-integrated recording application made for Apollo (Mac/Thunderbolt)
2 Unison-enabled Hi-Z instrument inputs
2 independent headphone outputs
Built-in Talkback mic for communication with studio talent and recording slate cues
Includes monitor remote functions and Mono, Mute, DIM, and ALT monitor controls
Up to 8 channels of additional digital input via Optical ADAT/SPDIF input
Optical ADAT/SPDIF output for connecting to additional studio equipment
Includes the "Realtime Analog Classics Plus" UAD plug-in bundle featuring the Teletronix LA-2A 1176, and Fairchild 670 compressors, Pultec EQs, UA 610-B Tube Preamp & EQ, and more. Other UAD plug-ins sold separately.
Runs UAD Powered Plug-Ins via VST, RTAS, and AAX 64 in all major DAWs
Uncompromising analog design, superior components, and premium build quality