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.
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
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.
“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)
March 21, 2023
Excellent produit de qualité… besoin d’autres update pour incorporer entre autres des cabinets de basse et plus d’options pour les placements de micros....Read More
March 16, 2023
Lifesaver & Timesaver. Sounds great and works like a charm. The presets are great too!Read More
March 12, 2023
YES YES YES
GET THIS. I was questioning the value of this in the studio - no longer. THIS IS the unit you need in order to better record your guitars and bass. Unreal. I LOVE this thing. Best...Read More
D. Garrett Jr
March 12, 2023
Very nice, but lacking....
First off, I'd like to say I love Universal Audio stuff..... BUT, this is an item that needs more attention from their R&D department in my HUMBLE opinion. First problem: To use the...Read More
March 7, 2023
Network set-up issues
Fantastic power amp attenuator. Great sound through the stereo outputs. Software could be enhance (more effects choices) and control with an external device (via USB or Foot switch, wifi...Read More
March 6, 2023
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
OX App Requirements
OX Amp Top Box
2.4 GHz Wi-Fi network with internet connection to register (once only)
(iPad) iOS 12 or iPadOS 13
(Mac) macOS Mojave or Catalina
(Win) Windows 10 64-Bit Edition
OX Amp Top Box
Excellent produit de qualité… besoin d’autres update pour incorporer entre autres des cabinets de basse et plus d’options pour les placements de micros.
Lifesaver & Timesaver. Sounds great and works like a charm. The presets are great too!
YES YES YES
GET THIS. I was questioning the value of this in the studio - no longer. THIS IS the unit you need in order to better record your guitars and bass. Unreal. I LOVE this thing. Best purchase of the year.
D. Garrett Jr
Very nice, but lacking....
First off, I'd like to say I love Universal Audio stuff..... BUT, this is an item that needs more attention from their R&D department in my HUMBLE opinion.
First problem: To use the software you have to register it. The registration is a complaint I hear from everyone, and one of my complaints. You have to hookup to a 2.4 Ghz network to register.... that's just plain DUMB.
2nd problem: No support..... don't try calling UA for help, they don't answer the phone and their support line for this is not working. GOOD LUCK!
Actually there are some other issues too... but I love the attenuation! I would suggest looking at other attenuators (BOSS WAZA) to compare before purchasing. I have not done this & now I think that may have been a mistake.
Network set-up issues
Fantastic power amp attenuator. Great sound through the stereo outputs. Software could be enhance (more effects choices) and control with an external device (via USB or Foot switch, wifi not reliable). Network set-up could be more user friendly, good thing it stays set after the first connection. i can appreciate my 100 watt plexi clone without turning deaf.
Still Awesome although FW and SW need updates
This is a great product. Built like a tank and sounds great. It' s showing it age in todays market though.
Don't know what's happening upside of UA's cranium but this diamond only needs a polish via its FW and Software and could potentially remain a formidable unit well into the future. Sounds great and keeps you playing and creating! Still love it!
OX BOX is great but needs IOS updates
Hardware is amazing but you need to update your IOS software for multitasking and landscape view. Also the ability to reposition mics to different places on the cabinet.
I’ve been using an old tube combo amp (circa ‘70s) into the OX, to a UA 4-710, into an Apollo. The variety of sounds from this simple set up is surprising, from clean to crunch, to grunge, even metal. Very well made, solid hardware.
I love my OX.
Having said that, we need a Leslie cab emulation !!!!
Perfect for guitarist home studios
I am a guitarist that has a small studio setup at home for songwriting and practicing. I’ve never been happy using amp sims and digital plugins for my direct guitar tone. The Ox has been awesome for me getting a tone I’m happy with and letting me use the amps I normally gig with. Looooove it!!!
Amazing box but needs an update!!!!
PLEASE FOR THE LOVE OF GOD, GIVE US A 15'' SPEAKER OPTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
This thing sounds fantastic on the given cabs, but is years overdue for a proper update hence the four stars.
Great for computers less for loudbox
I bought this mainly to use as a loudbox and was a little disappointed, I used a couple of the best 12 awg speaker wires available on the market however going beyond position 4 the sound degrades excessively losing too much treble and bite, it doesn't can compensate with the EQ of your amp or guitar effects pedal. contacted customer service for explanations and advice they repeated "due to fletcher munson effects quieter sounds will have more midrange and less bass/treble" repeating it to me several times although I already understood it at the first, but it is not possible that it already happens at position 3 in such an intrusive way! it is unusable from 3 onwards. the difference in decibels between position 5 (no attenuation) and 4 (first level) is minimal and certainly not worth the cost of the product. I want to hope that for other speaker and amp combinations it works better than with my custom hiwatt and fane speaker. the other functions are excellent: speaker simulator, microphones, presets, output to audio interface and mac all beautiful and high quality. not to the level of the loudbox only functions.
I LOVE this thing.
What a game changer. I have this connected to my Apollo via the optical connection and it sounds SO good. Love it. Being able to use my pedal board + 3 amps and yet keep it all contained in either my headphones or nearfields is just a beautiful thing. The power soak / attenuator bit is great too, don't get me wrong, but I don't use it as much. The desktop app on macOS works great - no issues whatsoever.
Could be 5 stars, but UA has abandoned support for OX
The iPad app is long overdue for an update to run in landscape mode or be compatible with multitasking features in iPadOS. Intermittent connection issues have always been a problem with the onboard WI-FI. An update to utilize the rear USB ports for connectivity would solve many of these issues. At this point I regret not purchasing a Kemper and sticking with my old Marshall Power Brake instead
What took me so long?
This thing absolutely rules. Messed around a little with the app which was cool but have just been spending my tube with the director cabinet emulation on the unit straight to speaker. And to be honest it hasn’t left the first rig setting at all. I look forward to the ride.
출시한지 시간이 꽤 지났음에도 불구하고 경쟁자가 없습니다
잠자고 있던 앰프 헤드를 잘 사용 할 수 있게 되었습니다
최고의 제품이며 추후 펌웨어 업데이트 혹은 새로운 버전의 하드웨어 역시 기대하게 만드는 UA의 기술력에 찬사를 보냅니다
I'm sure this is a great product because everyone's raving about it! I found the manual very hard to follow and not terribly helpful. I can't figure out how to record the Ox into Cubase 10. If anyone who reads this is interested, I would gladly pay for a 30 minute support call over Zoom. Contact: firstname.lastname@example.org or Whatsapp: +491623847955 thanks, Rick
OX Box is the top guitar experience!!
The OX Box is a beautiful experience just out of the box! It have the most lush guitar sounds that are unbelievable. Just amazing… Thank Universal
The OX Box surpassed my expectations!
As a working guitarist I was well aware of the OX's capabilities in handling high-powered overdriven tube amps like vintage Marshalls and boutique amps like Soldanos and Dumbles and making them more manageable at loud levels in the studio. However, I wasn't sure of how they would respond to a clean full jazz tone with an archtop hollow body. Well, I was pleasantly surpised when I hooked the OX up to my blackface Fender Twin Reverb with a 1963 Gibson L5CES. Fantastic! Warm and fat with plenty of response...I rely on the sound and feel of my stage level at about 5-6 but that is not normally possible when I do my online videos and prefer to have the amp nearby. The OX more than solved my problem and mated beautifully with my Apollo Twin interface straight into OBS for video recording and Logic Pro for audio tracks. Bravo, Universal Audio! Another triumph.