Bob Bullock's book 'Bullock on Boxes' written a good 10+ years ago, has some equations for predicting excursion and thermal power handling as well as the usual frequency response and max SPL, all against frequency. These do not give results anything close to WinISD Pro, especially the excursion and power ones.
Are Bullock's equations based on outdated and incorrect theory?
Are Bullock's equations based on outdated and incorrect theory?
I would trust Bullock before WinISD pro.
My own sims (self written) do not match WinISD, nor do they match Bassbox. Just as a check, I confirmed my own sim with sims run by D'Appolito using LEAP's "quickbox" sims in several speaker builder articles.
Some people use RMS rather than Peak excursion - so the results may differ by a factor of 1.414. Bullock uses RMS in his sim programs.....
My own sims (self written) do not match WinISD, nor do they match Bassbox. Just as a check, I confirmed my own sim with sims run by D'Appolito using LEAP's "quickbox" sims in several speaker builder articles.
Some people use RMS rather than Peak excursion - so the results may differ by a factor of 1.414. Bullock uses RMS in his sim programs.....
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