So with 1.0.1 code I have my LE set to 4 ohm with:
Volume 40-45
Head treble 80
Head bass 50
Cab bass 110
Cab treble 20
...and the woofer connected to a Polk 10” powered sub cranked about 50%.
This thing absolutely rocks! The bass guitar parts are clear and distinct and whole thing just rumbles at all the right places.