very true. sometimes with cheap amps you run into problems of the amp failing from the vibrations. i'd get some foam weather stripping from home depot or lowes and and line the belly of the amp so that the belly of the amp isnt slapping the box. you want the stripping to be thick enough to absorb the vibrations so not something too dense. at the same time if you pickup stuff thats too thick you might bend the feet where you screw it to the box....which isnt too bad but still want to avoid bending the amp feet.It's not bad, but it's not ideal.