Im running helix lt to a yamaha mg6x with stereo XLR, then from the mixer to two JBL LRS308s, again with XLR. What is the best output level from the Helix for this configuration and should I use any Gain or the Pad option on my mixer? And would -10db be proper on the JBL's or is the +4 db setting more appropriate? Thanks in advance, I'm not sure if this is a dumb question, I'm new to mixers and modelers.