Displacement limit is, as I mentioned, ONLY good as a limit below a certain frequency.....
And it can be modified by cabinet design, ported takes a big chunk out of the limit, and a horn can virtually do away with the limit. Both within a particular range, of course.
the true displacement limit based on size and Xmax / X damage is directly relevant in an infinite baffle.
Seal the cab, and the power handling is modified, because the available power input isn't directly related to movement by output acoustic power..... the cab limits output, and also limits movement. it can take more power in, and puts out less sound, at lower frequencies.
Ports reflect a high impedance back, and limit movement, but teh limit "has limits", it goes away at much lower frequencies, and there can be a range above the port tuning where movement limits power also.
Horns, within their effective range, drastically limit movement, and totally "distort" the relation between movement and sound power output.
Any decent manufacturer will use all these facts to arrive at a real power handling number. And it SHOULD be assumed to cover only the usable (quoted) frequency range.
if marketing "made the unit specs competitive", then it's a "pants on fire" situation, and who knows what the real number is.......
Sorry.... displacement limitation is NOT "all you need to know".
