Klipsch La Scala Help


A friend has acquired a pair of 1960's era La Scalas. One has a blown woofer. He is having trouble figuring out how to access the woofer to replace. He says they are covered in 'rat fur', that I assume is a 'carpet-like' covering used for pro-sound applications. Does anyone out there have experience with these cabs? How can he access that woofer? Thanks in advance for any help.