I beleive you may have nailed the cabinet Goodwill HIFI
http://cgi.ebay.com/JBL-4560-Bass-Bi...02115007r25002
The ad above somebody is selling the plans for that box and they have a picture of one done. It looks identical to me! GOOD CALL!!
....Thanks for your thoughts regarding the items. Now if I can just figure out what that mid bin is....although after reading the jbl 4560 is only going to go down to 60hz....SO I willl likely pass on the enclosure....I think?!!....