All of the CTS 10's in my 73 SVT 810 work. 9 of them are clear & articulate, but one of them sounds "fuzzy". when i play a note i can hear the note, but it goes fuzzzzzzzz. the other speakers are very clear sounding, this one isnt. I don't see any tears in it, but there was an obvious repair made at one point, it has a purple colored glue around the cone. Maybe the cone is not sealed properly? any ideas?