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Universal Audio OX Stomp Speaker Emulator Pedal — main product image
Universal Audio OX Stomp Speaker Emulator Pedal
Universal Audio OX Stomp Speaker Emulator Pedal
Universal Audio OX Stomp Speaker Emulator Pedal
Universal Audio OX Stomp Speaker Emulator Pedal
Universal Audio

Universal Audio OX Stomp Speaker Emulator Pedal

★★★★★4.2 (17 reviews)

Studio-grade cabinet and mic emulation in a pedalboard stompbox — the UA OX Stomp brings authentic amp tone to direct recording without compromise.

$244.30*$349.00Save 30%
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Universal Audio OX Stomp occupies a specific and valuable position in the signal chain: it sits between your preamp source — whether that's a real amp head run into a load box, or an amp-in-a-box modeler — and your recording interface or PA, translating the raw electrical signal into something that sounds like a properly mic'd, room-recorded guitar cabinet. The Dynamic Speaker Modeling at the core of the OX Stomp doesn't just apply an impulse response snapshot; it models the physical behavior of speaker components under load, including the cone breakup, compression, and harmonic content that a real cabinet generates as it's pushed harder. The result is a tonal character that responds to pick dynamics and playing intensity in a way that static IR-based cab simulators often miss.

The OX Stomp houses 22 cabinet emulations and six microphone models, configurable via UA's Bluetooth mobile app with control over mic placement, blending, and room emulation — the same award-winning room processing found in UA's rack-format OX Amp Top Box. Connectivity is practical for both stage and studio: 1/4-inch I/O handles pedalboard integration, USB-C enables direct DAW recording as an audio interface, and Bluetooth manages the deep parameter control without putting a laptop in your signal path. Build quality reflects UA's professional hardware standards — the enclosure is pedalboard-grade, designed to handle the physical reality of live performance. For guitarists building a direct rig around an amp-in-a-box front end, the OX Stomp provides the cabinet layer that elevates the chain from functional to genuinely studio-competitive.

Key Features

Dynamic Speaker Modeling convincingly emulates speaker breakup, drive, and cone cry

Expand the Tones of any Amp-in-a-Box Modeler and award-winning Room Emulation

Perfectly mic’d amp tones and craft stunning guitar sounds with UA effects

Customize with a Full-Featured Mobile App

22 cabinets and six microphones, OX Stomp gives you nearly any tone imaginable

Specifications

Speaker Modeling
Dynamic Speaker Modeling
Cabinet Emulations
22
Microphone Models
6
Connectivity
1/4-inch audio I/O, USB Type-C, Bluetooth
Power
9V DC (high-current — see manufacturer specs)
App Control
UA mobile app via Bluetooth
Brand
Universal Audio
Model
OX Stomp

Pros & Cons

👍 Pros

  • The 22-cabinet and 6-microphone combination covers an enormous tonal range, from vintage British open-backs to American closed-back 4x12s, giving you session flexibility without physical cabinet changes.
  • Dynamic Speaker Modeling captures the non-linear behavior of a real speaker under drive — cone cry, voice coil compression, and cabinet resonance — which is what makes modeled tones feel three-dimensional rather than flat.
  • USB-C direct-to-DAW recording eliminates an analog conversion stage, keeping the signal path clean and the recorded tone consistent with the monitored tone.
  • The standalone operation after Bluetooth configuration means the pedal is stage-reliable — it doesn't need a phone connection to function once dialed in.
  • Award-winning UA room emulation adds depth and space without requiring a reverb pedal in the chain, which simplifies the rig for direct-recording applications.

👎 Cons

  • High current draw (well above typical stompbox requirements) means you'll need a premium isolated high-current pedalboard power supply — budget power bricks will not work reliably.
  • The feature depth — 22 cabinets, 6 mics, room emulations, UA effects — requires meaningful time with the app to dial in. Players who want instant results may find the learning curve steeper than simpler cab sims.
  • At this price point, the OX Stomp competes with full-featured amp modelers that include preamp simulation alongside cabinet modeling; guitarists who haven't yet invested in a separate amp-in-a-box need to factor in additional front-end cost.
  • Physical control on the pedal itself is limited — deeper tone shaping requires the mobile app, which is a friction point in live mid-set adjustments.

Frequently Asked Questions

For direct recording and IEM monitoring, yes — convincingly. The Dynamic Speaker Modeling replicates the mechanical behavior of a real cabinet, including cone breakup and speaker compression at various drive levels. For full-stage amplification through a PA, it feeds a studio-quality signal. What it doesn't do is push air in the room the way a physical cabinet does — that tactile experience is absent in direct applications.
The OX Stomp is designed explicitly as a downstream processor for amp-in-a-box modelers. You run the output of your modeler into the OX Stomp's input, and it layers its 22-cabinet and 6-microphone emulations on top of the modeler's preamp character. This lets you separate preamp and cabinet selection, mixing UA's acclaimed cab library with whatever front-end tone-shaping you already use.
The UA companion app connects via Bluetooth for preset loading, cabinet selection, mic placement, and room emulation adjustments. Setup and sound design happen in the app, then the pedal operates standalone without requiring a phone connection. Bluetooth is not in the audio signal path — it's purely for control, so any connection quirks don't interrupt your signal.
Yes, 9V DC, but current draw is higher than a typical analog stompbox — check the UA specification for exact mA requirements. Standard 9V 100mA pedalboard supplies will not be sufficient. You'll need a high-current isolated output (typically 500mA or more) from a supply like a Strymon Zuma or Cioks DC7.
The USB Type-C port enables direct connection to a DAW as an audio interface, sending the processed cabinet/mic/room signal as a clean digital feed. This is one of the OX Stomp's most practical studio features — it removes an analog conversion step and delivers the processed tone directly into your session.

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