Universal Audio OX Amp Top Box – Legendary Tube Amp Tones at Any Volume

The Universal Audio OX Amp Top Box is the ultimate reactive load box and guitar recording system, designed to deliver studio-quality tube amp tones in any setting. Whether you’re practicing, recording, or performing live, the OX Amp Top Box lets you push your tube amp to its tonal sweet spot — without disturbing the neighbors.

Featuring Universal Audio’s groundbreaking Dynamic Speaker Modeling, the OX is the first system to accurately emulate speaker breakup, drive, and cone cry, making it the finest speaker attenuator and guitar amp recording solution available today.

Key Features

• Play and record your tube amp at any volume – Get cranked amp tones without the need for excessive volume.
• Instant studio-quality mic and cabinet setups – Dial in stunning tones with a simple turn of the RIG knob.
• Over 100 custom Rigs – Audition, tweak, and save professional presets from your iPad, Mac, or Windows computer.
• Dynamic Speaker Modeling – Experience true speaker breakup, cone cry, and harmonic complexity.
• Built-in stereo effects and room modeling – Get authentic mic’d room tones without needing an external setup.
• Silent practice mode – Play through your amp at full power using headphones.
• Comprehensive I/O – Balanced TRS outputs, stereo S/PDIF, optical TOSLINK, and footswitch compatibility.

The World’s Best Reactive Load Box

Universal Audio’s engineers designed the OX Amp Top Box to act as an authentic speaker substitute, maintaining the tone, dynamics, and feel of your tube amp even when fully attenuated. Thanks to its continuously variable impedance and response, your amp “sees” the OX as a real speaker, ensuring zero loss of tone or playing dynamics.

A Complete Guitar Recording System

Forget complex mic setups — the OX Amp Top Box delivers studio-grade cabinet, mic, and room sounds at the turn of a dial. The front-panel six-position RIG control lets you instantly switch between expertly designed setups featuring close-miked cabinets, ambient room mics, and up to four studio effects. No mics? No problem.

Revolutionary Dynamic Speaker Modeling

Unlike static Impulse Response (IR) systems, OX’s Dynamic Speaker Modeling faithfully captures the organic response of a speaker under real-world conditions. Using the Speaker Breakup knob, you can dial in the subtle harmonics and sonic complexity of true speaker breakup, giving you the real feel of a cranked amp.

Seamless Connectivity for Recording & Performance

The OX Amp Top Box is equipped with a wide range of connections for both studio and live applications:

• Front-panel headphone jack – Practice at full amp power without disturbing others.
• Stereo S/PDIF & Optical TOSLINK outputs – High-fidelity digital connections for DAWs and studio monitors.
• Balanced TRS stereo line outputs – Connect to a mixing console or audio interface.
• Footswitch compatibility – Use a standard one, two, or three-button footswitch to toggle OX’s effects.

Intuitive Software Control

Unlike other guitar products with clunky digital interfaces, the OX Amp Top Box software offers a sleek, intuitive experience. Via Wi-Fi, you can tweak, save, and recall hundreds of presets on your iPad, Mac, or Windows 10 computer. Assign your six favorite tones to the front-panel RIG knob for instant access in the studio or on stage.

Why Choose the Universal Audio OX Amp Top Box?

The OX Amp Top Box is the ultimate solution for guitarists, producers, and engineers seeking authentic amp tones without volume restrictions. Whether you’re recording in a professional studio, tracking at home, or performing live, OX delivers **stunning amp tones with zero compromises**.