Problem with speaker at higher volumes - answers????


My buddy who is "internet deficient" asked me to try and find a solution to a problem he has with one of his speakers (Wharfedale but don't have the model although it would appear to be a generic type problem and I assume not indegenious to that particular manufacturer.) He is experiencing what he says sounds like a "thwap" sound coming from one of his speakers when he is playing it loudly and only on very dynamic passages. At lower volumes all is well and apparently the amp isn't clipping. I defer this problem to those more expert than I who reside here... Any possible answers???
rgd
The speaker is being overloaded. In particular if you look at reviews on www.audioreview.com , it is a common problem with the wharfedale diamond 7.1.
It's probably the woofer's (or mid-range's) voice coil or the cone "bottoming out" from over-excursion. If it's not already damaged, it will eventually destroy the coil and/or diaphram if one continues to over-drive the speakers.
Tx guys for your comments - seems logical to me. If he wants to keep the speakers would more power solve the problem or is it just a matter of reducing the volume? Changing the speakers to a more efficient model would no doubt help but he really likes the speakers...