Not sure where you’re getting these numbers, I can’t find anything on them. Regardless, wattage ratings for self-contained systems like these isn’t terribly relevant. For instance, if the speakers used internally are inefficient, it will require more power to get the same volume as another system using efficient speakers. In addition, products like these don’t conform to the FTC power-rating guidelines, so basically a manufacture can claim anything.
Regards,
Wayne A. Pflughaupt