quick question about dd's or any sub for the matter

[alexj01_83 6]

I bought two brand new dd 3512's I thought they blew but when they got to dd they said that the motors had shifted. Then they asked me if i droped my box or if a had gotten in a car accident. (which i hadnt) they fixed them and they are on there way back I was wondering if this has happened to any one else??? im running 4 subs all 3512's other two where fine.

[KU40 173]

It happens with every manufacturer. Usually the culprit is the shipping company dropping the packages.