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.

• 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