Get $299 in UAD plug-ins and instruments FREE through 2/29! Learn more ›

Save $300 on UAD Accelerators through 12/31! Find a dealer ›

Get up to 70% savings on UAD plug-ins storewide! Shop 12 Days of UAD ›

Hello world 4!

Hello world 5!

The UAD HolidAI Sale — save up to 75% storewide. Shop Now ›

Shop Holiday Deals on UAD Spark. See My Offers ›

Get perfectly miked guitar tones in seconds.

Standing on the shoulders of our award-winning OX Amp Top Box, OX Stomp Dynamic Speaker Emulator pedal gives "amp-in-a-box" modelers a packed pro studio full of authentic-sounding guitar cabinets, mics, room modeling, and studio-quality effects — right at your feet.

Get three-dimensional, album-ready guitar tones from your amp emulator thanks to Dynamic Speaker Modeling

Experience jaw-dropping speaker, cabinet, and room emulations far beyond common IR loaders

Add studio-quality 1176 compression, plate reverb, EQ, modulation, and stereo delay effects for perfectly produced tones

Audition, tweak, and save custom presets and more with the UAFX mobile app

TAKE A LISTEN

Say Goodbye to Static-Sounding IRs

Say Goodbye to Static-Sounding IRs

Going far beyond the one-dimensional captures of Impulse Response systems, only UA’s groundbreaking Dynamic Speaker Modeling convincingly emulates speaker breakup, drive, and cone cry — providing harmonics and sonic complexity indistinguishable from a perfectly studio-miked speaker cabinet.

Experience Award-winning Room Emulation

Experience Award-winning Room Emulation

In addition to expertly placed close condenser, dynamic, and ribbon mics on your cabs, OX Stomp is the only effects pedal to offer a complete selection of room mics with Dynamic Room Modeling. This gives you the authentic experience of pushing air while recording your cranked amp in a world-class tracking room.

Enjoy Studio-Quality Effects

Enjoy Studio-Quality Effects

Beyond mic and speaker cabinet modeling, OX Stomp also lets you craft stunning guitar sounds with UA effects like genuine 1176 compression, plate reverb, chorus, flange, three delay types, and four-band EQ with high and low-cut filters.

Expand the Tones of any Amp-in-a-Box Modeler

Expand the Tones of any Amp-in-a-Box Modeler

Whether you're using a UAFX amp emulator pedal or other popular amp modelers, multi-effects, or profilers — even your favorite amp's preamp line out — OX Stomp gives you over 100 curated RIG setups, giving you inspiring sounds for any amp type or genre, right out of the box.*

Customize your OX Stomp with a Full-Featured Mobile App

Customize your OX Stomp with a Full-Featured Mobile App

With the UAFX Control app, you can easily swap cabs and mics, fine-tune effects, assign RIG presets, and configure footswitches to instantly toggle sounds and/or effects, for a pro studio's worth of tones on your pedalboard.

Watch Now to get Perfectly Miked Guitar Tones

      UAFX Control App & Owner's Manual

      *Note that OX Stomp is designed for instrument and line level only — it's not a speaker load or power attenuator. OX Stomp Dynamic Speaker Emulator requires a modern 400 mA isolated power supply (sold separately). Go here for power supply recommendations.

      Features

      The most authentic sounding speaker, cab, mic, and room tones ever emulated in a stompbox

      Authentic speaker modeling including speaker breakup, drive, and cone cry

      Over 100 curated RIGs perfect for any amp emulator or genre for endless inspiration

      Studio-quality effects including genuine UA 1176 compression, plate reverb, EQ, and stereo delay (dual, crossover, ping-pong) for perfectly produced tones

      UAFX Control app for fine-tuning mics, effects, and footswitch configurations

      Silent switching, buffered bypass, analog dry through

      Customer Reviews

      OX Stomp Dynamic Speaker Emulator

      Overall Rating

      2.6/5
      (24)

      C. Leitao

      February 18, 2024

      Amazing sound terrible app

      Please, stop release pedals until you change your software team. Disaster. How can we setup a delay without inserting numbers, taptempo or a pop up button? Sliding the finger in 8cm line is ridiculous. Hardware is amazing, never enjoy playing with headphones as I do now…

      M. Durno

      February 14, 2024

      App & Bluetooth Fail Befuddling for UA Product

      Majority reviews below already speak to the shortcomings that make it essentially useless to comment on the actual sound of the pedal. The app and Bluetooth functionality is so poor that it's borderline inappropriate to sell this version of the pedal (certainly not compared to any other UA product I have used or read about). The UAFX app is terrible for any pedal, but for the Ox Stomp it's the only way to use the damn thing. It's an unacceptable miss that everyone rightly expects to be corrected "yesterday."

      . Dekker

      February 8, 2024

      Sounds great but app SUCK

      It sounds great. But the app man what a hell! We need a desktop app!! then it deserves a 5 star rate

      F. Poleri

      January 24, 2024

      The app doesn't work

      Impossibile to use. If the app is not fixed i will send it back.

      P. Gomes

      January 11, 2024

      desktop app

      I JUST CANT MAKE IT WORK WITH ANDROID APP. PLEASE MAKE A DESKTOP APP ASAP. EVERYBODY IS ASKING FOR. SOUNDS AMAZING BUT WE CANT MAKE IT WORK! HELP US UAD. WE SPEND A LOT OF MONEY ON YOUR PRODUCTS.

      C. George

      January 7, 2024

      pplprsn@icloud.com

      The sounds on this are great and (unlike the overpriced OX box) this will be a new fixture on my recording rig, however, two glaring issues hold this product back: 1) the app is terrible and makes demoing the different capabilities of the pedal extremely tedious. The adjustment controls are covered by my fingers and are difficult to fine tune. My phone decides to go to sleep while I'm verifying the sounds and then, well, it's another slow process to reconnect the phone app to the pedal. Terrible. Make a desktop app. Like the OX Box. 2) The inability to blend different speakers and combinations of speakers and mics is really a missed opportunity. IR loaders usually have this feature and it's an obvious miss from UA. I would love to blend several speakers/mics on output 1 and then use output 2 for the direct signal only. This would make the pedal perfect. Until then, UA is missing the boat.

      C. George

      January 7, 2024

      Great sounds, terrible app, and a big missing feature

      The sounds on this are great and (unlike the overpriced OX box) this will be a new fixture on my recording rig, however, two glaring issues hold this product back: 1) the app is terrible and makes demoing the different capabilities of the pedal extremely tedious. The adjustment controls are covered by my fingers and are difficult to fine tune. My phone decides to go to sleep while I'm verifying the sounds and then, well, it's another slow process to reconnect the phone app to the pedal. Terrible. Make a desktop app. Like the OX Box. 2) The inability to blend different speakers and combinations of speakers and mics is really a missed opportunity. IR loaders usually have this feature and it's an obvious miss from UA. I would love to blend several speakers/mics on output 1 and then use output 2 for the direct signal only. This would make the pedal perfect. Until then, UA is missing the boat.

      W. Cooper

      January 4, 2024

      Great speaker emulator, needs Desktop App

      Very happy with the cab sounds I’m getting from the OX Stomp. Easy to setup, no issues getting the OX Stomp firmware updated. Setup the app on my iPhone and was able to connect.

      Only issue is, I have one eye, so trying to tweak the settings on my iPhone is a hassle. Since there is no Desktop App this makes it hard for me to use. I do have 20/20 vision in my one eye, but having a Desktop App for us visually challenged musicians would be very helpful.

      If it had a Desktop App I would give it 5 stars.

      P. Hatcher

      January 4, 2024

      Found a way to get the app working

      This is an update to an earlier review. I finally got the iOS app stable and I'm enjoying great tones, but still only give it 3 stars due to frustrations of the app. The problem is that the app isn't really suitable in the day-to-day context of how you use a phone: if you flip to another app, or if your phone locks, or if you get a call etc, the app will often loose connection.

      Like many people, I have my phone set to lock after a minute or so of inactivity. This is the first thing you have to turn off: if the phone locks, the app can lose connection, and you're in a world of pain. After I discovered this, it's been mainly good – as long as no one calls me! (You need to remember to re-activate screen lock once you've finished using the stomp, a bit of a pain).

      All this obviously points to one glaring fact: relying on a phone app to control this type of device isn't really suitable in the real-world context of how a phone is used, especially if you want to use it in a long session to explore and tweak tones. UA, please please give us a desktop app that would solve this major usability issue, and maybe it could get 5 stars.

      C. Emmons

      December 31, 2023

      Just not reliable

      As others have stated, amazing tones but I just dont have the time to be run through the mill everytime l want to edit a patch. Going to be shooting it out to see if its worth keeping or take it back

      E. Mello

      December 30, 2023

      Did not work here so far

      did not get a good sound till know and the app do not work

      w. noah

      December 22, 2023

      I just need a stable Mac OS !

      it is so less stable ,the iOS always say“ restart your pedal ”to me!I will crazy!it wasting my time now!!!

      C. Kieninger

      December 19, 2023

      Would be perfect if there was the desktop app…

      As the title says, I am a long time user of the ox box and now also bought stomp to possible replace the ox box, as I also own the best attenuator on the market - so the ox box seamed overkill additionally. The whole sound experience is the same - but it doesn’t have the absolutely beautiful desktop app the ox box has and has no digital out… if those two factors could be solved it would be the perfect device

      q. qw

      December 13, 2023

      434472123@qq.com

      fu k. is. shi. t.

      P. Hatcher

      December 7, 2023

      App is beyond terrible

      Pedal sounds decent enough, but I just can't explore its potential as I just can't get the app to work. I also have a Ruby, which previously worked fine in the app. On receiving the Ox Stomp, I upgraded everything to the latest versions. First time I tried to connect to the Ox Stomp, it just instantly crashed the app. Once I removed the Ruby from the app (obviously not ideal as I want to use that too), I finally managed to connect... once. Since then, I can't connect, I constantly get a 'try to reconnect your pedal' or 'forget the device and re-pair'. Come on UA, this is really poor. This pedal cost a significant amount - £380 - and I can't really use it. Please prioritise upgrading the app. Or better still, release a desktop app.

      C. Cordes

      December 5, 2023

      UNUSABLE APP!!!

      First, the Audio Quality is UA Standard, top notch! But the APP is horrible! I tried iPhones, iPads and Android Devices. In a Recording Situation this unit is absolutely USELESS because the app crashes all the time, looses connection and doesnt find the pedal. The sliders jump around when you touch them and settings get lost. Why is there no desktop app?! It is needed so badly!

      J. Cardoso

      December 4, 2023

      Great sounds, bad app

      The unit sounds awesome but it's a pain having to go through the app. Keeps getting disconnected and then I have to reboot my pedal for it to connect again and it's just not possible to do this in live situations. Kind of a bummer, but it has tones for days.

      S. Bobrov

      November 14, 2023

      inconvenient to use

      each time you login , you must enter authorization . Why does the studio client need my account information ? Bluetooth is not stable connection

      F. Orcesi

      November 2, 2023

      Extremely faulty bluetooth connection

      I've had for 10 days, and only able pair it's bluetooth once. It's really frustrating.

      J. Kim

      November 1, 2023

      Good Job UA! Just one thing to say.....

      Other guys already said same things about BT-APP issue. I hope UA fix asap. Other than that, it's just perfect gear for my recording project.