yup flexing or vibration is bad for an amp. i have mine behnd the seats. not on the seats, between subs and back seat, so i fold down to tune.
Quote Originally Posted by I800C0LLECT View Post
One of the bigger issues with mounting to a box is flexing. Whenever your box flexes, so will the amp. That's adding stress to the internal board and can eventually cause fractures or even failure.

Mounting on the box isn't the best idea.