The demo units of the Imagine speakers I auditioned also had sticky rubber ports, may mga nakadikit pa na mga fibers (I'm assuming from cloth rags).
The rubber on my two-year old Imagine speakers is not sticky (knock on wood), maybe because the room they are placed in is not humid at all.
@Lancito, kung mahilig kang magtanggal-kabit ng speaker grills, alalayan mo yun cloth na nakakabalot sa metal grills. Dahil mabigat yun grills and manipis yung cloth, may tendency na yung gilid ng cloth matanggal sa pagkadikit sa grill kung madalas nagagalaw young grill.