Universal Audio OX Guitar Amp Top Box

The Universal Audio OX is a Guitar Amp Top 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. Mission accomplished. Just plug your tube amp’s speaker output into OX, and then plug OX’s output into your cabinet, and you’ll enjoy your amp’s natural tone like never before.

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.

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.

All The Right Connections

Not only does OX Amp Top Box feature a front-panel headphone jack for silent practice with your cranked tube amp, it also sports a bevy of connections for all kinds of recording and live workflows. Stereo S/PDIF digital outputs via RCA and optical TOSLINK, as well as balanced TRS stereo line outputs with front panel level control, give you the necessary connections for studio monitors, DAW, or live mixing console inputs. Plus, you can connect any one, two, or three-button footswitch and toggle OX's studio-quality effects on and off.

A Beautiful Software App

Most guitar products do digital awkwardly. They’re ugly and hard to understand. The OX software app, on the other hand, offers slick, intuitive control over all of OX’s RIG settings via Wi-Fi — letting you tweak, store and recall hundreds of presets from your iPad, Mac, or Windows 10 computer. You can then save your six favorite tones onto OX’s front-panel RIG knob for instant recall in the studio or at a gig.

Product Specifications:

Type: Reactive Load

Power Handling: 150W RMS

Impedance: 4/8/16 ohms

Attenuation: 5-way switch

Inputs: 1 x 1/4" TS (from amp)

Outputs: 1 x 1/4" TS (to speaker), 2 x 1/4" TRS (line/monitor), 1 x Coax (S/PDIF), 1 x Toslink (S/PDIF), 1 x USB Type B, 2 x USB Type A

Headphones: 1 x 1/4" TRS

Other I/O: 1 x 1/4" (foot control)

Features: IR Cab Models

Power Source: 12V DC (1.5A) power supply (included)

Height: 5.5"

Width: 15"

Depth: 9"

Weight: 14.1 lbs.