Your PBN EPS-2 speakers are very big and heavy. This means that shipping
overseas is only possible via couriers like FedEx, DHL etc. I am pretty sure
that even the lowest courier will cost easily over 2000 USD.
At current courier rates it only makes sense to ship overseas items that are
under 31kg and can be shipped via national post.
Different countries may also have different max weight and measurements.
Inside EU we have cheap and fast DHL Freight for heavier items.