Ok, so I'm really trying to understand what happens to a woofer when a clipped signal is sent to it. I've attempted to model what a clipped waveform would look like in excel. For these charts I assumed the clipping level to be .5v, and sent the amplifier a 1v signal at 20hz, thus resulting in a full clipping senario. I calculated harmonics at 40,80,160 and 320hz, with each half as strong as the previous. This is where I'm unsure if I've modeled correctly. Is it safe to assume that 40hz is half as strong as 20 hz and so on? Here are the graphs.

This is a graph of the fundamental plotted with the harmonics for demonstration.

This graph is the summation of the harmonics only, no 20hz signal.

This graph shows the clipped fundamental (blue) with the summated harmonics added to it only above and below .5v.

And last, is the same graph with any output above and below .5 cut out as the amp has no capability there. This is what I would assume to be the final signal and path of the subwoofer.

Would this be a good model of the motion of a clipped 20hz signal as the subwoofer would see it?