Line 6 - The HX Stomp XL processor's Command Center functionality, MIDI capabilities, and external expression pedal jack make it an ideal master controller for your entire setup. Learn more: https://line6.com/hx-stomp-xl/
Line 6 | Helix Minute: Connect External Expression Pedals
Line 6 HX Stomp XL Amp & Effects Processor Provides Eight Footswitches for Expanded Control
Line 6 Helix Floor Tutorial #3 - Expression Pedals
What external pedals do you guys use with helix/pod? : r/Line6Helix
Best external expression pedal for use with Helix - Helix - Line 6 Community
Helix and external pedals (what you running?) : r/Line6Helix
External TRS / Aux switch for Helix LT. Can this be done? : r/Line6Helix