Suppose a newly-born pair of rabbits, one male and one female, are placed in a field. The original problem investigated by Fibonacci in 1202 was about how fast rabbits could breed given ideal circumstances. According to Tobias Dantzig, his father was “a lowly shipping clerk nicknamed ‘Bonaccio’, which, in the idiom of the time, meant a ‘simpleton’.” Which made ‘Fibonacci,’ the ‘son of a simpleton’… This couldn’t have been further from the truth. From sunflowers to sea shells, the same recurrent mathematical pattern can be observed in Nature, again, and again, and again…įibonacci “Leonardo of Pisa” was an Italian mathematician who lived in the Middle Ages. The Fibonacci numbers are applicable to the growth of every living thing: a single cell, a grain of wheat, a hive of bees, all of mankind. From the leaf arrangement in plants, to the pattern of the petals of a flower, the bracts of a pine cone, or the scales of a pineapple. Here you can't fix it in the x/o, you need a trap circuit.They are found everywhere in Nature. The exception being sealed bass and a narrow OB. Want to (and can't well) use the FR with baffle loss. To fix the hump rather driver filters, as you do not Hump and good OB design allows you to use the x/o Towards the shorter distance causes baffle loss.īoth drivers in a FR + bass unit are subject to the baffle Variation of driver distance to all the baffle edges,Īnd reducing the mean distances, which weighted Rounding the baffle makes it worse, reducing the Raises and makes the baffle hump a bit peakier. Smooth the baffle hump, the alternative is 10" which Ideally 20" to minimise the baffle loss and to lower and The height of the top edge above the driver centre is Of the width to smooth the hump, its centre ~ 12" and 8" Optimum driver position is at ear level or the equivalent forĪn angled front baffle. Limits the drivers maximum SPL and distortion levels in theįrequency areas the rest of the baffle affects the response. In all respects putting a driver near the edge of a OB severely Response it does this by chucking away driver excursion below Then I cut the upper half of the baffle following the Fibonacci spiral shape, the same golden spiral present in nature in many life form, with the fostex in the spiral center So I decided to try different baffle shapes and test how the edge diffraction affects imaging and sound signatureįirst I simply moved the fostex off center in the same rectangular baffle, using the Fibonacci sequence to determine the exact offset from one side edge, then the upper and finally the other side. Wondering about open baffle from the last couple of months, I finally decided to give them a try, so I bought a pair of Fostex FF85wk and put inside a rectangular baffle 20" height and 12" wide, very close to the golden rectangleĪs soon as I connected the two raw test article to my Trends Audio 10.1, it became immediately clear to me that I love the open baffle sound vs boxed speakers, in this case further enhanced by the coherence of the little fullrangeīass, below 200Hz, was compromised of course, but the rest of the spectrum was soooo clear, sweet, open and detailed, only sound stage and imaging suffered a bit, I thought due the wide baffle
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