i have a infinity refrence one.
very warm sounding two way speaker with 2 inche soft dome tweeter and 6 inche woofer air suspension bookshelve design.
, but after few hours i started hearing purr purr with bass frequencies. lol
after i looked closely i saw the surround ring of woofer was off the woofer cone.
cannot be glued back, so it needs a new surround ring.
will order a pair from ebay to replace the torn one.
this happens to infinity, advent, polk, some jbl models. well it can happen to any nonrubber ring of woofers which are designed to give very precise bass frequencies instead of acting like a subwoofer.
this donest happen from speaker abused but its called aging and has to be replaced, probably happens faster in exterme weather conditions. i will post as progress takes place meanwhile yr input is wellcomed