BASSFACE SUPPORT CREW SPL15.2S Instruction Manual page 5

You'll be referring to our data and speaking to our distributors to choose a box design, but
some general information is that a larger box will tend to give more low bass but at the
expense of some power handling. If you are lucky enough to have a large and powerful
amplifier then you will be able to run the subwoofer harder in a more controlled fashion. A
less powerful amplifier always carries with it the risk of burning out the speaker due to
distortion and the resulting excessive heat soak.