An overheated voice coil can cause the thin varnish on the wire coil to bubble and fill the gap between the coil and the magnet and bind. Woofers can be checked by carefully pushing the cone in and out, taking care to push evenly on both sides of the dust cap while feeling/listening for a scraping sound or a rough place in the cone movement. A woofer with restricted movement can sound thin.
Were My Speakers Damaged ?
My "friend" was kind enough to start my system with the volume way up. At least 20 db too much. I don't see any physical damage to my AR2ax's, but they seem to sound a bit thin. Lacking in the midrange. The pots work fine. Am I just imagining a problem? Other than looking at the speaker capacitors for leakage, etc., what else can I check? TIA