Universal Audio OX
Reactive Load Box
1 in stock at Hobart store — Ready to ship or collect in store
In stock at warehouse. Allow additional days for shipping.
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For a limited time, get Paradise Guitar Studio for FREE when you buy a new OX Amp Top Box to get huge guitar tones whether you’re recording your favorite tube amp or direct into your DAW.
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.
Ends Sept 30.
Terms & Conditions: Offer valid only for customers who purchase an eligible OX Amp Top Box from an authorized UA retailer between July 1 and September 30, 2026. Customers must register their purchase by October 15th, 2026 to receive free promotional plug-ins (no substitutions, all fulfillment is subject to approval by Universal Audio).
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.
Featuring Universal Audio’s breakthrough Dynamic Speaker Modeling, OX is the first system to accurately emulate speaker drive, breakup, and cone cry — making it the world’s finest speaker attenuator and guitar amp recording solution
Now you can:
Play and record your tube amp in its tonal sweet spot — anywhere, at any volume, with full dynamics
Audition, tweak, and save more than 100 jaw-dropping custom Rigs from compatible iPad, or Mac/Windows computers.
Get stunning mic and guitar cabinet combinations at the turn of a RIG knob — no miking required
Get authentic “edge of destruction” sounds, complete with UA Dynamic Room Modeling, speaker breakup, and cone cry
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.
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.
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Premium, no-compromise analog reactive load box and guitar recording system for tube guitar amps
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Instant album-quality mic and speaker cabinet tones via front-panel RIG control
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Get record-ready sounds quickly with expertly-placed virtual mics and cabs — no amp miking required
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Five finely-tuned guitar amp attenuation levels, from completely silent to whisper quiet to full band volume
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UA Dynamic Speaker Modeling emulates speaker drive, breakup and cone cry
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World-class Universal Audio EQ, compression, delay, and reverb effects built-in
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Selectable 4, 8, and 16-ohm operation
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Front-panel Headphone out for silent practice with cranked tones
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Balanced TRS line outs and S/PDIF digital outs for stereo recording
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Pair with the OX mobile or desktop app over Wi-Fi for editing and saving RIG presets
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Footswitchable control of OX's studio-quality effects
For more information, click here to visit the manufacturers website.
