We played a small outdoor gig Saturday. During sound check the sound guy comes up with his tablet and says, I'm getting no highs from you, play a note.". I play and he shows me some sort of frequency thing and sure nuff nothing over 400hz. I reach down and grab my tone and crank the treble, on a Pbass using EMG Geezers with stock pots and harness, and up jumps the response and he says there it is and is happy. Is it normal for a tone control to kill the response that low? Am I confused with all of this? Signed, Befuddled Bassist.