I inherited a pair of 4311's from an older man who passed recently. Hooked them up and neither speakers woofers work. Hooked the woofers to a sine wave disc and they move like they should. So Im assuming its not the voice coil. Its odd to me that both speakers are affected in the same way. The other components in the speaker work fine. May i assume that this is a crossover problem? I have had no experience or training in electronics. Any help would be greatly appreciated. thanks in advance guys. dave