I mean yeah, it has no headphone jack, which you gotta admit is a pretty big one. It also has no audio interface, no variable impedance on the input (in retrospect, a mistake), the signal flow view—which is pretty critical in amp modelers—is hidden in a menu by design, something that size with full modeling capabilities should probably have XLR outs, and the two biggest ones:
- There's no elegant UI for selecting, browsing, or editing amps and cabs unless you first assign them to stomps (which would make absolutely no sense)
- There's (almost) no need to deal with dynamic DSP allocation; that is, 98% of the time, you can put whatever effect you want onto any switch. At the time, managing your DSP was an alien concept for almost all pedalboard-centric guitarists. (It still is for most)
As HX Effects was meant to be a 9-block successor for M13 and M9, we knew from the beginning that it would never have amps or cabs. So we specifically designed the hardware and UI/UX around effects only. But at the same time, we wanted a tiny 6-block Helix for pedalboard guitarists, which is why HX Stomp was developed in parallel, with an audio interface, headphone jack, no amp control outputs, and a UI that brings the signal flow and amp/cab selection/browsing/editing to the forefront. Because we knew it
would have amps and cabs.