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
Supports MIDI-over-USB*, improved Bluetooth and hardwired connections, and more via the updated UAFX Control app
UAFX Control app for fine-tuning mics, effects, and footswitch configurations
Silent switching, buffered bypass, analog dry through
Cab Emulations***
1x10 Black Cha (Fender Super Champ w/ vintage Fender "Blue")
4x12 UK VEE 30 (Marshall 1960 TV cab w/ Celestion Vintage 30s)
4x12 CA VEE 30 (Mesa/Boogie Recto large cab w/ Celestion Vintage 30s)
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.
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
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
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
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**.
Expand your Tones with MIDI Control
Using its rear panel USB-to-MIDI connection, OX Stomp fits right into your programmable MIDI rig, receiving preset changes and realtime control of effects, EQ, and more. It’s the fast ticket to live performance heaven*.
Powerful App Control with Hardwired or Bluetooth Connection
The UAFX Control app allows you to easily swap cabs and mics, fine-tune effects, assign RIG presets, and configure footswitches to instantly toggle sounds and/or effects. Plug right in with a direct "hardwired" USB connection to your smart phone, or enjoy rock-solid control over Bluetooth.
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What They Say
Ox Stomp is perfect for getting a good tone with just a couple of pedals. We’ve come a long way from lugging huge amps to sessions to get a great sound!
Butch Walker
Green Day, Weezer, Taylor Swift
Ox Stomp is a great tool for practicing on the road! Along with the Lion '68 Super Lead Amp pedal, I get superior sound on the go.
John Notto
Dirty Honey
I really love the Lion and Ox Stomp! They're the only way I can really play my harp through a variety of amp styles outside of a DAW..
Emily Hopkins
UA Studio Sessions
Frequently Asked Questions
UAFX pedals require an isolated 9 volt DC, center negative, 2.1 x 5.5 mm barrel connector (same as standard Boss connectors) power supply that can provide the following current requirements: Full-sized UAFX pedals (with two footswitches) require 400 mA (milliamps) of current; Compact UAFX pedals (with a single footswitch) require 250 mA (milliamps) of current
Connect the pedal using a USB-C cable to your compatible computer, and run the UA Connect application to update your firmware.
Dual footswitch UAFX pedals have Bluetooth, and you can download the UAFX Control mobile app from the Apple App Store or Google Play Store, to connect to your pedals and access additional functionality.
Each UAFX pedal has unique functionality. We recommend carefully reading the accompanying manual for each pedal here.