The biggest challenge that I personally have sending a pair of brand new speakers in for a review is
(1) Some reviewers may take it apart to see the inside guts, I know if you ask them not to, they won't.
(2) They need to drive it hard for their measurements. I know if a speaker is well designed, driving it hard won't break it, but I don't want to take that chance and if it did broke, I'm pretty sure it's not covered under warranty.
(3) It's a brand new speaker, I should be the one to de-virginize it.