Look it up fast

Every control on an interactive top panel, plus what the six LED colours actually mean.

Every jack on an interactive rear panel, the two loops, and why USB is not an interface.

The numbers that answer a question, starting with the one that defines the device.

Line 6's own decoder for the HX library. The amps are not on this device; the effects are.

Two settings decide whether it sounds like the demo or sounds broken. Both live in a menu, and neither is a tone control.

What an impulse response is, how to load one, and why a downloaded preset can load fine and still play the wrong cabinet.

With no amp or cab in the way, what you can actually fit.

In front, in the loop, four-cable, or direct with an IR.

Four snapshots, two footswitch modes, and the global bypass combo.

What a controller can actually reach, the three messages that recall a sound, and the trick that lets one preset serve several songs.

Straight answers to the things people actually ask.

Symptom, cause, fix — including what is documented behaviour rather than a fault.

What an update changes, what it leaves alone, and the one-minute backup that means it never costs you anything.

Block, snapshot, four-cable method, IR, Legacy.