My advice is to put on your favorite albums and let them play through all day at a reasonable volume. Take some time every now and then to sit down and do some critical listening, looking for a more "full" sound. Most speakers will sound "tight" and "hollow" right out of the box so feed them plenty of hours before judging whether they're worth keeping or sending back.
As far as I know, there's no quick-and-easy way of breaking in speakers. This is why many prefer to invest in used speakers.
As far as I know, there's no quick-and-easy way of breaking in speakers. This is why many prefer to invest in used speakers.