Universal Audio's breakthrough Dynamic Speaker Modeling, OX Amp Top Box 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. OX Stomp Dynamic Speaker Emulator pedal gives "amp-in-a-box" modelers a packed pro studio full of authentic-sounding guitar cabinets, mics, room modeling, and studio-quality effects — right at your feet.