Incorporating dozens of high-fidelity speaker emulations in a compact, streamlined box that allows you to instantly dial in sweet spot tone at any volume, the Universal Audio OX Amp Top Box Attenuator is a paragon accessory that provides prime tone in any location. Built around UA's formidable Dynamic Speaker Modeling technology, the OX Amp Top Box easily captures the coveted sound of near-breakup tube tone and lets you tweak it to your particular taste in a few minutes flat.