LINE 6 POWERCAB 112 / POWERCAB 112 PLUS   So are these the Helix FRFR speakers we’ve been requesting for, like, years? Nope—Powercab is waaay beyond your bog standard FRFR speaker. When paired with any modeler, it’s an active speaker system that can deliver a much more authentic “amp-in-the-room” playing experience. However, when set to Flat mode (and whether you load IRs into Powercab or your modeler), Powercab amplifies the sound of your presets as they are, similar to a traditi