Universal Audio OX Amp Top Box Reactive Amp Attenuator (Open Box)

The Universal Audio OX Amp Top Box is a sophisticated reactive load box and attenuator designed specifically for tube guitar amplifiers. Its primary function is to allow players to achieve their amplifier's optimal 'cranked' tone at manageable volume levels, making it suitable for home practice, studio recording, and live performance where stage volume needs to be controlled. By safely loading the amplifier's output, it protects the amp from damage while enabling the power section to operate at its sweet spot. The unit features Universal Audio's proprietary Dynamic Speaker Modeling technology, which accurately emulates the complex behaviour of real guitar speakers, including speaker breakup and 'cone cry'. It includes a comprehensive cabinet emulation system with dozens of classic microphone and speaker cabinet combinations, accessible via a front-panel 'Rig' control or the dedicated OX mobile/desktop app. The OX provides five finely-tuned attenuation levels, from complete silence to full band volume, and offers selectable impedance matching for 4, 8, and 16-Ohm amplifiers. Integrated world-class studio effects include EQ, compression, delay, and reverb. Connectivity is extensive, featuring balanced TRS line outputs, S/PDIF digital outputs (both coaxial and Toslink), a front-panel headphone output for silent practice, and USB ports for app control and updates. This makes the OX an exceptionally flexible tool for guitarists seeking authentic tube amp tones in any environment, from the bedroom to the professional studio, without compromising on analogue signal integrity.