Thanks all for your advice. It looks like that the only way to get it fixed is to get the replacement from Harbeth. I'm discussing with Harbeth UK to see if it's possible to get from them directly.
Also there is a local speaker repair guy that can attempt to recoil the wire inside woofer. Does that worth a try ?
Also there is a local speaker repair guy that can attempt to recoil the wire inside woofer. Does that worth a try ?