I am using a JBL EON615 as an FRFR Cab... Helix LT could not make the limit light on the JBL main out... Light at all with all outputs and inputs maxed...Talked with local JBL authorized repair center... This tech guy assures me the Helix is just "consumer grade audio at -10db"
After email to Line 6 tech I have been informed the "Line out" is indeed the "pro" level of +4dbu.
JBL did an advanced delivery on a replacement EON even before confirmation was made that the Helix output is at "pro"level of +4 dbu.At that output level the Helix can indeed "clip" or bring to "limit" the EONs main output, if the chosen speaker input gain is maxed.
Props to L6 & JBL this combo sounds and behaves fantastic.Easy to transport.
Just thought I'd share...