Found this link at Talkbass.  Pretty cool, and dig the old McIntosh power amp!
 
http://dozin.com/jers/90srig/90s.html

The caption leaves stuff out.  There's a black unit that projects over the stompboxes (my guess would lighting for same), under the boxes there are 2 homemade-looking units, 1 with knobs & 1 with a jack (I/O for the effects loop?), then a space & 4 more homemade units w/nothing on the front, which at first I thought were blanks, but then noticed that you can see boxes behind at least 3 of them.  Sure would love to know what that stuff is!
 
Peter