OX Amp Top Box
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
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
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.
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 or Mac. 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.
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.
Watch The Reviews
February 15, 2018
I am not exaggerating when I say that I see no need to ever mic a guitar cabinet again. This is hands down the most useful and exciting piece of gear I have ever purchased!!!Read More
February 14, 2018
The Perfect Solution for Guitarists
This box has given me everything I have ever wanted from my gear. I can crank my tube amps all the way up and attenuate them down to normal listening volumes. I can practice silently at...Read More
February 13, 2018
Finally, a professional powersoak and cab sim with room and effects unit
This is without doubt the best unit for creating finished sounding guitars direct into your recording system. Bring up the room sound for a gloriously "real" amp in the room...Read More
February 10, 2018
I love it!! Does everything you advertised it to do. It means I can turn up my 100W Two-Rock amp and play it in the basement with a band or record late at night using my regular set up. The...Read More
February 9, 2018
I have two other reactive loads with recording emulation. This is nothing like those other two. Those other two are now for sale. The iPad wifi setup was dead easy, and it works well....Read More
February 9, 2018
If you don't feel like reading the whole review, I'll save you the time, BUY IT. I have always sworn that you can hear the "digital" in other cabinet emulators, even the...Read More
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
OX App Requirements
- OX Amp Top Box
- Apple Mac or iPad
- macOS: Sierra or High Sierra
- iPad: iOS 11
- Wi-Fi network with internet connection to register (once only)
For complete compatibility information, visit help.uaudio.com
OX Amp Top Box
I am not exaggerating when I say that I see no need to ever mic a guitar cabinet again. This is hands down the most useful and exciting piece of gear I have ever purchased!!!
The Perfect Solution for Guitarists
This box has given me everything I have ever wanted from my gear. I can crank my tube amps all the way up and attenuate them down to normal listening volumes. I can practice silently at night and not bother anyone. I can record with beautifully crafted guitar tones using the UA speaker emulations and plugins through my actual amp and pedals. The software is elegantly designed and easy to use / navigate. The plugins included and room emulations are top notch as expected. I can take those professional sounding tone presets and save them to the Ox's rig selector dial and use them live for a perfect sound directly to the PA. And to top it off the box itself and packaging are absolute works of art, it looks beautifully vintage-y and substantial on top of my amp. I can't wait to see what features and functions they plan to add to it in future updates. Thank you Universal Audio for making this amazing piece of gear that I now cannot live without.
Finally, a professional powersoak and cab sim with room and effects unit
This is without doubt the best unit for creating finished sounding guitars direct into your recording system. Bring up the room sound for a gloriously "real" amp in the room sound, truly magnificent. Using the EQ and compression section I am able to get a great "finished" sounding guitar track as if it had been recorded on a console with all the expensive outboard stuff that is found in professional recording studios. It's just so easy to get a really good finished sound. "Finished" is the key for me. I hate messing around with reamping etc in order to find the tone I'm looking for. Reamping is a complete waste of time in my opinion. Getting the sound right before you hit record is the key to fast productive recording sessions and this really delivers. A bit expensive ?, well, maybe but it's worth it, at least it is to me. Highly recommended.
I love it!! Does everything you advertised it to do. It means I can turn up my 100W Two-Rock amp and play it in the basement with a band or record late at night using my regular set up. The control over the sound with the different cabinets and microphone configurations, not to mention the UA effects is to die for. Thanks for making such a useful product!!!
I have two other reactive loads with recording emulation. This is nothing like those other two. Those other two are now for sale.
The iPad wifi setup was dead easy, and it works well. The Mac apps works well too.
If you don't feel like reading the whole review, I'll save you the time, BUY IT.
I have always sworn that you can hear the "digital" in other cabinet emulators, even the expensive Torpedoes and Kempers. If you like that, great, I personally hate that digital aliasing weirdism junk that happens in their tones.
Along comes this thing. I'm a huge UA fan, and I believe that Universal Audio has the best analog emulations on the market, period. So naturally, when I heard they were putting this baby out, I was intrigued.
I work on a lot of metal stuff. So I was a little sketched out the entire time I was waiting for the preorder, because out of all of the videos I found on this thing, NONE of the guitar players were playing anything remotely metal, or even hard rock-type stuff. So I was definitely a little uneasy about it.
I got it before the app came out, apparently Sweetwater accidentally shipped a week early. I saw one of the default presets was a greenback 4x12. I've always preferred vintage 30's to greenbacks but I said what the hey and plugged my EVH 5150 III into it and took the line outs directly into our console.
You guys ever hear a piece of gear and your eyes just go wide and you get the "holy ****" feeling? This was one of those. This greenback 4x12 cab emulation sounded better than any cabinet I've heard in person to date. It was insane.
Then the app comes out. I messed around with the mics, EQ, reverb and delay, and I got some insane tones. The user interface is incredibly smooth and easy to use, a musician that isn't used to dialing in studio gear could use this thing no problem. I also think the build of the unit itself is just gorgeous.
The parameters are so cool, like you don't get the unlimited mic movement like you do the torpedo and some other emulators, but these are more than impulse responses, these are true emulations in the usual UA fashion that we've come to know and love, down to descriptions of exactly how the mics were placed in the room in relation to the cab.
Don't have your guitar player sit too close to it (within two feet), it will feed back a little, but that's very avoidable.
So that's about it. An easy-ish way to put it is, you know how you hear your amp go through your favorite cab, and it sounds amazing, so you mic it up and add some EQ here and there to capture that tone? This thing sounds pretty much exactly how I want my guitars to sound without having to mic a cab or process much of anything at all. And it goes without saying that this thing is great for reamping.
I honestly was a little disappointed at first when I found that there were no V30 emulations, and I still kind of hope that they come out with new emulations as time goes on, but at the same time I just don't care, this thing is a work of art. Buy it.
I have NOT tested this out as load box into a live cabinet, I've only used the balanced line outputs.
Universal audio nailed it once again! One of the best pieces of gear I have ever purchased. Both sides of the OX are pro level sounding, taking into account the real amp feel that we guitarists always seek. Having owned all similar products of this category, after buying the ox, they all sound plastic and artificial. It is a must have for every guitarist and every studio owner.
Absolutely unreal! Love it. Sounds amazing with all my amps. Killer box!
OX Captures The Soul Of My amps & Saves My Ears
I have to say the OX is just incredible. I have yet to record anything to Logic that doesn't sound great.
In the past, I usually get slowed down with dialing in a great sound. For example, while the Kemper has the potential to sound great, it's way more time consuming to find the sounds you want as you basically have to find a profile (out of hundreds/thousands) that fits what you need. The other closest competitor, Two Notes Studio, in may opinion blows chunks compared to the OX.
Lastly, I can crank my amp while keeping volume well under control. This is good for my ears. Lots of guitar players eventually get Tinitus (ringing in ears) due to playing in front of cranked amps for hours at a time.
So with the OX, just plugin into the amp I want and get a perfect sound fast. Then just add some plate reverb and done!
Oh happy day
Love the OX!
I'm in an environment where I can't get my amps up loud and stick mic on them, so I've tried a number of solutions in the past to mixed results. Software amp emulators are ok for some things, but not all... I've tried reactive load boxes with IRs and that was just a hassle. Previously, I had asked UA to provide an IR loader plugin so I could use a reactive load and get real-time UAD monitoring of the amp tone to no avail. I know there are workarounds with that, but it wasn't a smooth workflow.
Well, I got my OX on the day it was available and I've found my solution - it lets me use my greats amps in their sweet spot (a Suhr Badger 30 and an old Fender Princeton Reverb), attenuate the signal in the room or the club, and utilize speaker modeling which - to my ears - is so much more flexible and better sounding than IRs.
I gave it 4 stars because of the lack of a Windows client (I'm on a Mac, but Windows should have ben there at launch) and the other items (foot switch, USB ports, internal sample rate) which should be addressed later as the product is in market for a while. If UA provided messaging about those features, it would have been 5 stars.
For my needs, OX is absolutely stellar! It's changed the way I record guitars, practice and play live.
Le top du top
La meilleure loadbox/attenuateur que j'ai jamais utilisé! Très facile d'utilisation !application Oxfam amp très simple et très intuitive!j'adore!
Tubbs sold me
Saw Shawn's video and that was it. Bought it.....
Way better than software emulation
Every single software amp either overly sags or sounds unnaturally compressed when the amp is pushed. Touch sensitivity feels artificial and the clean break up is way off. This changes all of that. Real tone with very good speaker emulation. Take the room out if you want the best sound out of this box. This is a must buy and having an attenuator too boot makes this a very good deal. Price tag is well worth it.
Thank you so much for the OX Box. Now it´s so easy to record my Git Parts in a professional way .....it´s party in my hands :-))
Then I first heard that UA was going to make this I thought nice, this must be good as everything is from UA!
The OX was not just good, it is the must sounding in its category! Everyone that is critical about products like this was really impressed by OX.
The only negative aspect is that I now really want to buy a lot of different amps
I just got mine this week after waiting a few months. Worth the wait. For my situation, where I can rarely be noisy at home, it is the perfect electric guitar recording/practice solution.
The realism and variety of the tones that it allows is incredible. I actually have been using it for practice with headphones more than for recording. The first time I turned it on I had my headphones on and thought I had accidentally run through the combo's speaker. Nope. It just sounds that real.
It seems like a hefty price tag until you realize the range of tones you can achieve from even one of your amps. The software is great, too. I wish they'd make the app for Android, also, so I could control it from my tablet. In the meantime, the desktop app suffices just fone.
If in doubt about purchasing or on the fence, just do it. I'll never sell mine. Well done, UA.