Plugging it into things
Every jack, what it is for, and the two or three that regularly cost people an evening.
04 · 7 min
For a mono rig, always use the LEFT/MONO jack of a pair. Using the right one on its own gives you half your effects and a thin sound.
The jacks
Click any jack to see what it does and what to watch for.
Helix Rack · Rear panel · 3U · schematic, drawn from Line 6’s panel diagram
GUITAR IN
TS, ¼″front panel
Your main instrument input — on the FRONT panel, not the back.
Front-panel placement is deliberate and divides opinion. It is ideal if you plug in at the rack, and awkward if your rack lives behind you and you wanted everything hidden. Switchable pad and selectable impedance, same as the Floor.
Helix Rack and Control Cheat Sheet (Rev C)The mono rule
Outputs come in stereo pairs, and only the left jack of a pair carries a summed mono signal. If you take one cable from the right jack, you get one side of a stereo image: quieter, thinner, and missing anything that was panned away from it.
This catches more people than any other cabling mistake, and it does not look like a mistake — it looks like the device sounds bad.