Her's is faster![]()
Zhy, mounting the amp to the box has nothing to do with the vibrations of the car. Installing the amp directly to the box directly absorbs the vibrations from the sub. Over time this will cause the sub to go bad if the sub vibrates bad enough. However, the sub looks like it is in a closed box so vibrations will be less than those of a ported box. It's probably not going to be a big deal overall
I wouldn't recommend mounting to that interior plastic. It isn't very strong.