OX Amp Top Box
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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.
“OX does not disappoint. The room mics give your recorded tones character and realism, and the delays and the plate reverb sound expensive. It's easy to use, yet deep, and most importantly, fun. UA has hit it out of the park with OX!”
– Pete Thorn (Don Henley, Melissa Etheridge)
“OX is a true game changer. New uses for it literally pop into my head every day. It’s head-and-shoulders above any product of its kind. For any guitarist who records his own tracks, OX is essential!”
– Josh Smith (Taylor Hicks, Raphael Saadiq)
“I can use OX on the most critical piece of music and be 100% happy. The UA team knocked it out of the park with this genius piece of gear. It’s perfect for the hobbyist in a bedroom, to the highest professional environment, be it studio or stage. Yes, OX is that good!”
– Lyle Workman (Beck, Sting)Customer Reviews
D. DiPietro
September 19, 2018
Spot on
Unboxed it a few hours and I'm sitting in my control room with a Deluxe and running the 1x12 Deluxe speaker sim. Going between the amp in the room and the line out coming through my JBL...
Read MoreM. Dannells
September 16, 2018
I Can Use My Tube Amps Again!
I am a touring guitarist and I switched to using a Kemper some years back to have an efficient touring/recording rig. While I still love my Kemper for live use, it is as of late usually...
Read MoreA. Noto
September 16, 2018
Game Changer!
Simply put, the OX is incredible! As an attenuator, it’s the best I’ve experienced and the speaker and mic sims are so real, so lush it’s hard to go back to the real thing considering...
Read MoreG. Koftinoff
August 21, 2018
Even with complaints it gets a 5!
First off, I've tried a lot of different amp sims and fx units/software over the years, and currently have the Axe FX II Ultra which is great in its own way, but I've always felt the sounds...
Read MoreH. Jørgensen
August 20, 2018
Almost..
Sounds great, but really miss a 4*12 with Vintage 30’s..
Read More -
Features
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
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Customer Reviews
OX Amp Top Box
D. DiPietro
Spot on
Unboxed it a few hours and I'm sitting in my control room with a Deluxe and running the 1x12 Deluxe speaker sim. Going between the amp in the room and the line out coming through my JBL monitors and it's 99% the exact same sound - a better job at mic'ing a cab then I've done over the last 30 years. I was skeptical and waited for some "non marketing" reviews before I spent the cash but for once the marketing hype was for real. Hate to be a fan-boy but the sound is the real deal. Won't add to my live rig until there's a flight case for it but for the studio it's a no-brainer.
M. Dannells
I Can Use My Tube Amps Again!
I am a touring guitarist and I switched to using a Kemper some years back to have an efficient touring/recording rig. While I still love my Kemper for live use, it is as of late usually in transit in the band trailer, so I wanted to have another option for home recording.
I am using it in conjunction with a UAD Apollo Quad, and I had an issue with some digital noise when I first plugged it in. It turns out I had a sample rate mismatch with the Apollo being at 48k and the OX running at 44.1k. If I have one complaint so far it is that it is limited to 44.1k as far as I know.
Tone? Pretty blown away. I am using my old 80s 50 Watt Marshall JMP which I rarely use because of the volume issues. I am currently working on a really heavy death-ish metal project and have been experimenting with different ways of achieving a really crushing tone (Note: The UAD Engl Savage model is pretty awesome, too). The front end gain is courtesy of Fender's new Full Moon Distortion. I got an early model of the pedal because I created some music for Fender that goes with these insane animations that will be released soon to promote the pedal line. A great pedal as well.
Anyway, I dialed up what I thought was a pretty killer tone, and then started messing with the presets. That's when s&*t got real! It was amazing that even with the same settings on my pedal and amp, the factory presets made things so radically different. You have a choice of mics, cabinets, room, EQ, 1176 Compressor, a delay/mod unit, and a plate reverb. All of the effects are up to UAD high sonic standards.
Anyway, I am spending some more time with it tonight and just wanted to give my initial impressions. Thanks, UAD for making me love tube amps again!A. Noto
Game Changer!
Simply put, the OX is incredible! As an attenuator, it’s the best I’ve experienced and the speaker and mic sims are so real, so lush it’s hard to go back to the real thing considering the benefits of silent recording. Looking forward to digging deeper with the iOS App and for UA to add more cabs. Bravo!
T. Nakatsuchi
Almost Perfect
I want to buy vintage 30's...
G. Koftinoff
Even with complaints it gets a 5!
First off, I've tried a lot of different amp sims and fx units/software over the years, and currently have the Axe FX II Ultra which is great in its own way, but I've always felt the sounds weren't quite real enough or present like recording a live amp. That has all changed with the OX. Using the output of your real amp and running it through their cabinet/mic/fx models is definitely the best I've ever heard. It will be amazing to try different amp heads on this as I slowly collect them! My only complaints: 1) They should have implemented the USB ports to hook directly to computer although the wi-fi does work fairly well. 2) If they did implement the USB, the unit could have MIDI in to sync the delay unit to your daw which makes things a lot easier 3) The quality of the processing is amazing but more would be nice. 4) Since you can't save your 'Rigs' or 'Presets' to your computer, a better filing system would be great. These are things that can all be worked around and hopefully with additional firmware/updates in the future, these things will be addressed. The bottom line is the unit sounds amazing so take the plunge!
H. Jørgensen
Almost..
Sounds great, but really miss a 4*12 with Vintage 30’s..
a. druon
Un nouveau mo de vraiment
Salut,
Ce n'est pas un n-ieme buzz sur le nouvel objet de MAO qui finit par décevoir.
Les Ir en leurs temps étaient une révolution, l'OX passe au mode supérieur, très supérieur meme / dynamique , profondeur, amplitude jamais entendu en sim à ce jour (ai vupassé chez moi au cours des 10 dernières année :torpedo(s), axe(s), kemper, rivera rockcrusher etc etc
R. Nickolopoulos
Finally!
I have been a frustrated "purist" for so, so long. I have great amps and guitars. I'm outfitted with an Apollo 8p, some great mics, and a Mac Pro. I'm a good musician and songwriter, and I'm technically savvy. All the ingredients for killer recordings, right?
Despite my every effort, I've never been able to get guitar tones to tape (disk) that represent (and enhance) the tones of my amazing amps. It's been maddening! I've tried isolation cabinets, normal attenuators, even tried going all digital using amp modeling stuff that so many people have tried to convince me are as good as the real thing. There's always been something missing. However, with real mics and speakers, I haven't been able to get it to sound like what I know people have achieved many times over.
Maybe it's some weakness in my skills as an engineer, or that I tend to get frustrated and need to get moving before the musical energy is sucked out of me. So many times I've gotten stuck going down the rabbit hole of thinking the tone isn't right, and it just drains my inspiration. With modeling software, again, I've heard so many people get great tones, but even with the lowest latency (latency is the bane of my existence), it just doesn't feel quite right and doesn't respond to my playing the way I'm used to.
I've got a long history playing live and recording situations (in real studios, with professional engineers). On my own, I've never been able to recreate the bliss that is the right amp through the right gear
I had all but surrendered to the cold reality that I was never going to be able to achieve what I know is possible on my own...
Never wanting to give up, and loving my other UA gear, I thought I'd give the OX a try. As I type this I am still vibrating with excitement. I plugged my guitar straight into my favorite Marshall, which I then plugged in into the OX, and plugged a good pair of headphones into the jack on the front...
From the first chord, I knew this was it. This is what has eluded me for so long. It feels REAL. My amp is my amp! And it's like I'm playing it through the best mics, pres, into the best board, in the best sounding room, with the best engineer, and I'm in Abbey Road!
I have to go to work now, and I am thinking of calling in sick. I can't believe this is happening! I want to go back a re-record so many tracks! And, I'm so inspired to create new ones!!!J. Henderson
Wow...
The OX is absolutely outstanding. It's a fantastic attenuator, yes, but the sound quality out of the box is simply stunning. I never thought anything could rival mics in a room, but this truly does it. Makes me second-guess my abilities as an engineer. It's also ridiculously simple to use. Seriously, seconds after plugging everything in, you are off and running. This is an absolute home-run. I can't tell you how skeptical I was until I heard it and played through it. It won me over instantly. Just an outstanding unit.
F. Silvestry
Overall it's really great!
So I got mine in January among the very 1st ones shipped and have had time to get to know better. I'm using 1.0.1 software now.
The stepped attenuator function is outstanding (used it with vintage brown face 6G2 Princeton, 60's Vox AC10 Twin and an AC15, a Savage Rohr (2x 10) and a Studious Selye). The 6 preset cabs (some with effects such as reverb and delay) sound nice via headphone jack for practice or thru my Apollo via SPDIF.
Now that I've gotten to spend a good amount of time with the OX software - I've created many of my own cab/mic presets since some all of the included ones were directly in my wheelhouse. Overall this produces very usable guitar tones using your amps. My own sonic preferences lean toward cleaner Vox and Fender sounds - and there are no shortage of usable sounds in here once you start tweaking. I've mostly used the digital out into my Apollo devices to record keeper tracks on demos.
Two minor complaints - one far is poor quality of the SPDIF Toslink input/door - Despite exercising genuine caution on my part when plugging/unplugging the cable, the "shudder" or door broke off on the very 1st insertion and now the Toslink cable connection is no longer as secure/tight as it should be. It's a pain to have to get this repaired on a brand new unit. This is minor but kind of annoying. I've decided to live with it.
The 2nd complaint is the stereo only output. It would be nicer to be able to separately send to your interface all three output sources (Mic 1, Mic2, and Room). Its fine to blend the mics and pan L and R, but it would be nicer to have the flexibility.
Overall this is an outstanding box with lots of uses for guitarists and a unique tool in my studio!!T. Kruck
Incredible Tool
I have received the OX Box today hooked it up and the first chord blew me away. I use the Two Notes Live and it sounded great but now? The OX sounds more alive, the highs are crisp, the effects... amazing. I couldn't be happier. The perfect match for my Bogner XTC and Mark V. The price is ok if you consider how much work they did spend in development. The hardware is 1st class nothing looks and feels cheap. Great work UAD.
W. McPherson
Perfect for our Business
The Ox Box is such a great piece of gear for us here at McPherson Stompboxes New Zealand. We build effects pedals + repair musician's backline gear and the Ox is proving to be very useful.
First off, now we can get great (and accurate) recordings of our pedals for online content. The Ox is definitely the best sounding way to get our Artisan effects pedals heard. Over the last 10 years we have tried a lot of different options and many do sound great but the Ox does sound the most convincing (vs standing in the room) + it is also the most convenient.
Secondly, when musicians want to try out our pedals they can now jam happily with headphones on through a cranked amp, while I'm am free continue working in the workshop. They really get to hear what our units sound and feel like at stage volume, their reactions are always enjoyable to watch.
Before the Ox cranking amps in the workshop would have caused problems with nearby residents....they should lighten up, it's just Rock & Roll!
Lastly, we do loads of Tube amp repair work and being able to test an amp through a great reactive load means, that not only can we tell that the amp is sounding how it should but also that it feels like it should.
No doubt I will find more uses for this great piece of gear, at the moment it gets used everyday!
All round great product, I've opened it up and the build quality is also very good, nice work Universal Audio, you should be proud of this one, it really does fill a big need!
R. Hanson
OX Amp Top Box
Great product that works with my Mac and Logic without any problems. The software that is provided with the product works very well and lets you save you rig configurations for use as you like to your computer. The only problem I had with the unit is it does not have a 2 ohm setting for use with my Fender Bassman, but there is a work around with a Weber Harness Cable, BMH Bassman Attenuator Harness from www.tedweber.com. I had contacted technical support from Fender and Universal Audio to see if this amp top box would work with the Fender Bassman and it appeared that it could. With the Weber Harness Cable, it works great. It would be nice if there was a 2 ohm setting on the Amp Top Box to work easier on amps with 2 ohms output. Great Product!!!!!!!
A. Manaia
Only 2 outputs!!!
Fantastic piece of gear!!! but it´s a shame we can´t record the 2 mics and the2 room mics in 4 separate outputs! Please!!! make a way so that we can use the analog and the digital outputs to separate the 4 mics. Nevertheless it´s really great sounding! Thanks UAD!
A. Morgan
Flexible toolbox for studio and live
Increadible tool for practice - can get my real amp sounds through can's or low volume, Gives a really good sound for demo's - so much so that many of them have ended up on the final recording. And perfect for playing live and getting the sound guy a decent workable DI every time while still hanging onto your monitor sound.
J. Caldwell
Almost there but not quite yet!
JCM 800 and 900 OX as a load box no cabinet connected. Sounds killer! Then I realized there were some features not implemented yet. I hate that! It's like getting the latest greatest car then having to wait for the wheels. In regards to the OX, if you have USB connections then make them functional and not part of greater scheme down the road. If you have a foot switch, make it do something now and not in a future update. There are some lacking features like the cab sims and mic placements being pretty much set at the factory. Sure UA can pick the best options, and they are good, but at $1299 I want to be able to move my mic positions and have more cabinets to choose from. There are ton of UA plugins that they could of used and maybe down the road they will, but pretty generic choices for now. This of course is all subjective. I will hold onto the thing and see where it leads because knowing my luck I get rid of it then vers 2.0 comes out the thing is stellar and I miss the boat. But it sounds good, built like a tank, esthetically pleasing, but only 75% there so please UA surprise us new owners and make it as stellar as it was advertised to be.
M. Huber
The best Guitarsound with a Cab-Simulator so far..
I tryed allready several Cab-Simulators and all of them couldn‘t get the feeling you have by playing through a real amp. The OX is the first Cab-Simulator who could do this! Its pretty amaizing! Even with headphones the sound is cool! You can get a fully processed sound very easy. The OX is well worth the money and I really recomed it! WiFi works without issues for me.. I‘m curious what the next updats will bring. A V30 cab would be cool..
W. Ridenhour
THIS is the one to get!
After much delay & countless YouTube demos of reactive load boxes & speaker attenuators ... I came to the conclusion that THIS is the one ... So I got on, y'all get ya one too!
S. Sterling
Love the sounds, exactly what i was hoping for. wifi sucks...
I absolutely love this thing.. my experience with other products - other reactive load devices plus other 'amp room' software wasn't great. I wasn't sure the Ox would be any better. I have an especially hard time getting headphones mixes that feel 'right'. The Ox nails it. My Reverb Deluxe sounds wonderful and i spend my time playing with the character of the cabs and mic's, easily getting great sounds - not spending my time trying to dial in a usable sound. 1 had to knock off 1 star from my rating though - the wifi is terrible. It won't stay connected to my home network, so i have to use the direct connect wifi instead - my ipad connects to the Ox's internal wifi. Event this is problematic - it's always searching for the Ox. I mean - my ipad is right next to the Ox - how hard can it be for them to find each other?
M. Hoogzaad
The OX is great but there is room for improvement!
I really like the look and feel of the OX, its really fun to play with! The cab/speaker/mic positions are a bit lacking imo. As a reactive load box with a 5 position attenuator the OX is nice but nothing new under the horizon. The attenuator seems frequency compensated and doesn't work great on every amp so try with your own amp before you buy! The OX app looks neat and works very intuitive although a Windows and Android version of the app would be nice. The OX has several I/O connections that don't work at this moment and what UAD plans with the OX are is unknown. For this price you may expect some major updates with for example a guitar cab with V30 speakers and some bass cabs, selectable higher sample rates with spdif (as an advantage this will also lower the OX latency), more mic positions or some EQ presets to mimic this, and maybe USB audio so you can record all mic tracks individually within your DAW, etc.
The OX is an very useful and great sounding box but there is room for improvement! If this means UAD plans to bring out a MKII version of the OX instead of giving its current OX owners some great updates i would be really disappointing. UAD is not very active on forums so what their plans are is unknown. I give it 3 stars at this moment...
