Get legendary studio tones from your tube amp — anywhere, at any volume.

Play and record your tube amp in its tonal sweet spot — anywhere, at any volume, with full dynamics

Get stunning mic and guitar cabinet combinations at the turn of a RIG knob — no miking required

Audition, tweak, and save more than 100 jaw-dropping custom Rigs from compatible iPad, or Mac/Windows computers.

Get authentic “edge of destruction” sounds, complete with UA Dynamic Room Modeling, speaker breakup, and cone cry

Details

Premium, no-compromise analog reactive load box and guitar recording system for tube guitar amps
Instant album-quality mic and speaker cabinet tones via front-panel RIG control
Get record-ready sounds quickly with expertly-placed virtual mics and cabs — no amp miking required
Five finely-tuned guitar amp attenuation levels, from completely silent to whisper quiet to full band volume
UA Dynamic Speaker Modeling emulates speaker drive, breakup and cone cry
World-class Universal Audio EQ, compression, delay, and reverb effects built-in
Selectable 4, 8, and 16-ohm operation
Front-panel Headphone out for silent practice with cranked tones
Balanced TRS line outs and S/PDIF digital outs for stereo recording
Pair with the OX mobile or desktop app over Wi-Fi for editing and saving RIG presets
Footswitchable control of OX’s studio-quality effects

Get Legendary Studio Tones from your Tube Amp — Anywhere, at Any Volume

OX is a premium reactive load box and guitar recording system, giving you perfectly studio-miked amp sounds from your favorite tube amp. OX lets you play and record your amp in its sweet spots — from huge clean tones and edge-of-breakup to fully cranked — at any volume level, and with mic, room, and speaker cabinet emulations at the turn of a knob.

Explore the World’s Best Reactive Load Box

With decades of analog hardware engineering expertise, Universal Audio’s dream team of engineers set out to design a reactive load box that retains the tone, dynamics, and feel of your tube amp — no matter how much it’s attenuated. The goal was for your tube amp to “see” OX as an actual speaker — with continuously variable impedance and response — so you don’t lose a drop of tone or playing dynamics.

A Complete Guitar Recording System

OX’s front-panel, six-position RIG control allows you to quickly choose from complete setups – including emulated speaker cabinets, close mics, ambient room mics, and up to four simultaneous studio effects. OX is also the only guitar recording system to offer a complete selection of expertly placed room mics, giving you the authentic experience of pushing air while recording your cranked amp in a world-class tracking room.

Shape Your Tone with Dynamic Speaker Modeling

UA’s groundbreaking Dynamic Speaker Modeling faithfully emulates speaker breakup, drive, and cone cry – an essential ingredient to authentic tube amp tones. Using the Speaker Breakup knob in the OX app, you can control the harmonics and sonic complexity that occurs only at certain frequencies and volume levels on various speakers – far beyond a static Impulse Response system – giving you the same sonic phenomenon that occurs with a real speaker cabinet