Hi, could someone give me an idea of what audible effect might be caused by worn out components in a 'speaker's crossover? I don't know much about electronics but I am aware that certain types of capacitors can leak with age and cause all sorts of problems in electronic circuits. My Mission speakers are 13 years old and I was wondering if the crossovers might now be past their sell-by date and if so, what I should expect to hear as a consequence? Any help would be much appreciated.