Hello, I would like to know why exacly my subwoofers are less audible when hitting lower frequencies then higher ones. It becomes unconfortable to my ears when it switches rapidly from diferent frequencies like if someone was turning up and down the volume nob of the sub between frequencies. Would also like to know, if possible, how to fix this kind of issue. Keep in mind this happens to most of subs i have listened to no matter if its a home sub or car sub, etc. Thanks!