Can't you adjust the shelves?

My take is that this is the "floor" of the cabinet, so there is no adjustable shelf.

Rebecca, easiest would be to raise the devices up so they clear ir eyes on the devices clear the bottom rail on the cabinet door. Small blocks of wood under each foot will do the trick but they might not be stable enough, perhaps an inverted "U" type of assembly out of a small piece of plywood and a thickness of wood on each side to raise the plywood up a few inches would suffice.

If you want to get fancy you can get an ir repeater or ir extender, something along those lines. Those have little ir "eyes" that you can install within line of sight of the remote, the other end gets plugged in to the device you want to control. They vary in complexity. And in price.

You can search online, but they do also sell them at stores like Radio Shack.

Mongo