After giving my speakers a severe blasting over a number of hours something gone wrong i can`t see any damage to the drivers but one speaker is now sounding crap thats the best way to describe the sound . so I am thinking I may have damaged a crossover is there anyway I can test the crossover with a meter,and if its a damaged a crossover could I change the pair of them? or just replace all the components any where recommended where to purchase the said components. The speakers are just KEF Q15 but I just love the sound of them.
There is a known fault on these Uni-Q drivers. They "sag" after time, i.e. the main driver aperture starts to catch or rub on the centre HF unit assembly, causing that "crappy" sound. The cure is to disassemble the main driver from the HF unit, having marked it for orientation. You then need to carefully sand back the circular aperture of the main driver a mm or so to increase its circumference. When you reassemble make sure that the "south" of the driver now becomes "north". This should cure your crappyness and reinstate the sounds you love. By all means check the crossover for bulging or leaking capacitors or any other obvious signs of failure like scorching while you are there but the above is more likely with this model.
cherrs CJ i will try this tomorrow you sound like you hit the nail on the head when looking at the speakers one seems to move more freely then the dud one the speaker seems to be in slow motion while the good one had a load more reflex movement