koby 74

I have a 5 string fan fret iron label bass with an interesting quirk. The neck of this bass has very little relief. The quirk is that while you might expect that the truss rod is very tight, it isn't. In fact, the truss rod is hardly engaged at all. Either Ibanez quite deliberately builds these basses with extremely straight necks, or this bass is just a bit odd. Or, of course, I might be misunderstanding this completely. Any thoughts?