@dbwinters , They are using a heat set glue. They either did not heat it well when they put the veneer on or they did not use enough glue. This is not that hard!!
Make sure the bottom of the iron is perfectly smooth. If not smooth it with 2000 grit silicon carbide wet or dry paper and use water or use 4-0 steel wool. Set the iron to the middle of it's temp setting. You should be able to tap the bottom without burning yourself. Where there are bubbles prick the center of the bubble with a sewing needle (to let the air out). Then place butcher's paper over the area and slowly pass the iron back and forth over the area, pressing down firmly for one minute.
If the veneer does not stay down they did not use enough glue and the speakers are defective. They should send you a new pair and return shipping labels for the defective speakers. I assume the speakers are still under warranty. If they do not want to do that tell them you want a complete refund, go buy something else and plaster them on the net. Errors are a fact of live. It is what a company does with it's errors that counts, particularly in these days of the internet.