http://www.audioheritage.org/vbulletin/showthread.php?19772-JBL-D110-F-dustcaps
http://www.audioheritage.org/vbulletin/showthread.php?21302-JBL-D110F-question
Conclusion. Know one knows, but...
Type: Posts; User: Horn Fanatic; Keyword(s):
http://www.audioheritage.org/vbulletin/showthread.php?19772-JBL-D110-F-dustcaps
http://www.audioheritage.org/vbulletin/showthread.php?21302-JBL-D110F-question
Conclusion. Know one knows, but...