I never argue with the bow, LOL! I tried all the ranges from 6 3/4 up to 7 3/4.
You can rob performance by having too low a brace just as having too high of one. Find the balance by starting low. Twist up the brace till you get a quiet shot and good speed.
Your ears will tell you. I will generally end up with a slight thump and decent speed. Try twisting your string twice, then shooting. It's a pain in the butt, but worth the effort.
You can be one twist away from perfect mix of silence and speed, just be patient.