William Sommerwerck wrote:

the easiest way to overdrive a speaker is to use a[n] amp
larger than the speaker[']s rateing [sic]

Actually, the easiest way to overdrive a speaker is to play it at a level
where it produces audible distortion. But as most listeners have no idea
what distortion sounds like...

Exceed X max (not difficult with ported cabs) and you can do a lot of damage
to the LF driver too.

Graham