Specifications
Only the numbers that answer a question somebody actually has. A source on every line, and a note wherever the bare figure misleads.
3U — 19 × 5.25 × 9.5 inches, 9.3 lb
Three rack spaces, not two. Line 6 publish this in a knowledge base article rather than in the manual, which states no dimensions anywhere.
Line 6 KB: Helix device dimensions17.2 × 9.4 × 2.5 inches, 7.2 lb
Sold separately. Worth measuring your pedalboard before you commit.
Line 6 KB: Helix device dimensionsUp to 32 across both paths
Identical to the Helix Floor — same engine, same limits.
Helix 3.80 Owner's ManualTwo, each with a parallel B branch
Helix 3.80 Owner's ManualFour maximum, two per path
Helix 3.80 Owner's ManualTwelve — on Helix Control, sold separately
The rack itself has none. This is the number one thing people miss when comparing prices with the Floor.
Helix Rack and Control Cheat Sheet (Rev C)Three on the rack, three more on Helix Control
No built-in pedal, unlike the Floor.
Helix Rack and Control Cheat Sheet (Rev C)S/PDIF in, AES/EBU in and out, wordclock in and out
The inputs and the wordclock are rack-exclusive.
Helix Rack and Control Cheat Sheet (Rev C)8-in / 8-out, 24-bit / 96 kHz
Helix Rack and Control Cheat Sheet (Rev C)440 in the shared HX library
Helix 3.80 Owner's ManualChecked against Helix 3.80. Several things in this guide do not exist on older firmware.