Hello:
Well just following Chris advise (taped moderate loud rock show):
"75% 9100 the rest of the gain should be made up with the M-1"
Leaved the 9100 at 75% then set the M1 knob, hide gear, enjoy the show and prayed to grab a great taping.
The result? WOW! by having the 9100 at 75% I had louder clearer sound, levels on M1 leaved them as always; hitting a little further the 12 on the middle.
Now I dont need to turn up the volume at MAX of the M1 as my previous 3-4 tapings with the 9100.
Before this I was afraid to push the 9100 further, so I used at 50% (little arrow on teh middle) I was afraid of clipping.
What a great device the 9100 is!
Thanks for the advise Chris!