I just got a CA-9 in trade. So far it sounds fantastic and honestly isn't that big a deal to lug around (lift with the legs!) But I didn't bother to check the physical specs before pulling the trigger and it won't fit either my 2U or 4U SKB rack cases. It'll fit in my shockmount 16U, but that's a little more rack than I really need for bass gigs. 
So if you're gigging an amp that's 18 inches deep, what are you putting it in? Is some heavy plywood based rack my only choice?
So if you're gigging an amp that's 18 inches deep, what are you putting it in? Is some heavy plywood based rack my only choice?