I have a pair of Killer'B II optima's with dual volume controls my problem is they dont turn down low enough on any of my Tesoro detectors , at the lowest volume they cause my right eardrum to reverberate ,prehaps its a problem with my right ear but I also have a killer'B Stinger that I use on my right ear without any problems ...So I would like to know from users of Killer'B's and other brands what brand is adjustable to a lower volume ...any advice is appreciated