Specifications
Only the numbers that answer a question somebody actually has. A source on every line, and a note wherever the bare figure misleads.
Eight
Six before firmware 3.0. A lot of the advice you will find online predates that change and undercounts you by two.
HX Stomp 3.80 Owner's ManualThree
Not eight. This is the number people get wrong coming from a full Helix.
HX Stomp 3.80 Owner's ManualThree, with four modes
FS3 is tap tempo in every mode, so two are genuinely free.
HX Stomp Cheat Sheet (Rev C)One stereo send on a TRS jack, two return jacks
HX Stomp Cheat Sheet (Rev C)9 V DC, 3 A
Line 6 strongly recommend the supplied adapter and nothing else. Most pedalboard supplies cannot deliver 3 A from one output — check the current rating, not just the voltage.
HX Stomp Cheat Sheet (Rev C)Audio and MIDI interface with re-amping
HX Stomp Cheat Sheet (Rev C)440 in the shared HX library
The same models as a full Helix. Only the room to use them differs.
Helix 3.80 Owner's ManualChecked against HX Stomp 3.80. Several things in this guide do not exist on older firmware.