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Reference
Reference

Specifications

Only the numbers that answer a question somebody actually has. A source on every line, and a note wherever the bare figure misleads.

Blocks per preset
Snapshots per preset

Four

Three on the smaller HX Stomp.

HX Stomp XL 3.80 Owner's Manual
Footswitches

Eight — six stomps, plus MODE and TAP/TUNER

Tap tempo has its own switch here, so all six stomps are free.

HX Stomp XL Cheat Sheet (Rev A)
Effects loop

One stereo send on a TRS jack, two return jacks

HX Stomp XL Cheat Sheet (Rev A)
Expression

One jack for two pedals or two switches

HX Stomp XL Cheat Sheet (Rev A)
Power

9 V DC, 3 A

Use the supplied adapter.

HX Stomp XL Cheat Sheet (Rev A)
USB audio

Audio and MIDI interface with re-amping

HX Stomp XL Cheat Sheet (Rev A)
Amp, cab and effect models

440 in the shared HX library

Helix 3.80 Owner's Manual

Checked against HX Stomp XL 3.80. Several things in this guide do not exist on older firmware.