Used Universal Audio OX Amp Top Box Guitar Recording System and Reactive Load Power Attenuator

Used Universal Audio OX Amp Top Box in excellent condition—an all-in-one reactive load, power attenuator, and studio-grade speaker emulation system for recording or silent practice with real tube amps. Features a reactive load and built-in UA Dynamic Speaker Modeling with multiple cab/mic/room options, plus onboard effects and Wi‑Fi app control. Connections include 1/4" speaker input, stereo line outputs, S/PDIF digital out, USB, and headphone monitoring for easy studio integration.