Rob, please post a photo. Whatever caused the problem (insufficient glue, not sealed to keep moisture out, etc), would you like to put in the effort to repair them? What veneer is on those speakers? If the cracks are not excessive, you could mix up some wood filler tinted to match the predominant color, use a wide putty knife to work the filler into the cracks, rub off the excess rub across the grain, not with the grain), let dry and sand down to your desired smoothness, then finish with your fav finish. If you don't like the resulting "look" BEFORE applying your finish, you've invested very little besides time and you could then either paint them or apply some new (oh no, here I go again
) paper-backed veneer.
