HX Stomp Step Beyond The HX Stomp amp and effects processor may be used as a “super stompbox,” a backup or travel rig, an add-on tone expander with other modelers, an audio interface—or a complete guitar or bass rig. Although compact in size, it delivers the same professional-grade sound quality and authentic HX Modeling found in our market-leading Helix processors. Line 6 HX Stomp is a multi-effects processor for guitarists that offers a wide range of amp and effect models in a compact pedal board-friendly size. Users can create and modify sounds using the 3 footswitches and the built-in display. It can be used as a standalone amp and effects processor, integrated into an existing pedal board, or as a recording interface. Line 6 HX Stomp is a multi-effects processor for guitarists that offers a wide range of amp and effect models in a compact pedalboard-friendly size. Users can create and modify sounds using the 3 footswitches and the built-in display. It can be used as a standalone amp and effects processor, integrated into an existing pedalboard, or as a recording interface.