They've been married for a week
and already he is AFRAID to tell her that the stereo was damaged? What kind of newlywed relationship is THAT? Sheesh, they are still supposed to be in the love conquers all stage, including items damaged in their move.
Seriously, if he can't tell her that he damaged the system without some dire consequences from the new wife, he shouldn't have gotten married. Accidents happen.
I mean really, if I met the woman of my dreams, and we got married, and she dropped my Optoma Projector, I'd be bummed, but I wouldn't take it out on her, I'd go get the new model to replace it, and tell her not to worry about it. On the other hand if it was the ex wife, well....
If he's really that much of a wimp, tell him to blame it on the movers.