Premium, no-compromise analog reactive load box for tube guitar amps. Features Five finely-tuned guitar amp attenuation levels. Front-panel “Rig” control for instant, album-quality mic and speaker cabinet emulations. UA Dynamic Speaker Modeling emulates speaker 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 recording. Pair with OX mobile or desktop app over Wi-Fi for editing and saving presets.