Hi, I have a centre speaker with one dome tweeter and 2 mid ranges of the same size. For a while now it seems that my centre speaker seems way too soft, even when I adjust the balance to 10db higher than all the other speakers. The other day I listened closely to my speaker and it seems that the tweeter and the left midrange were loud and the right mid range was barely audible. Are the two mid ranges meant to produce different sounds or is my right mid range faulty? If so, how do i repair it?