Bren,

Interesting discussion. Spent quite some time today doing Fourier analysis. I've forgotten so much since college

___________

So if I were to rebuild his Figures with the amplitudes reversed, I could prove that woofers would blow before tweeters...
_________________

That's correct. And the 'heat' answer is on the right track, I think. Just the shear mass of woofers, much stronger mechanically and thermally.

As for the Ian's quote... - see my comment above