In general, starting from about 125% of the driver area you taper down to about 25%, over a length of about 10'. Never got the impression there was anything terribly difficult involved in the design either. The whole thing was stuffed full of dacron fluff. The taper went first from the front to the back, then folded down to the bottom, up again then back down and out the front. Far-Field Support in the Electromagnetic Waves, Frequency Domain. Basically it tapered from being a little bigger than the driver which was at the top front of the enclosure to maybe about 1/4 where it ended in a rectangular port at the bottom front. Hello, somebody knows how i can calculate the Q of a quarter wave resonator (a tube with one open end), without measuring it Im looking to do 1/4 wave resonator array for absorbtion so i would want to be able to test different configuration without having to build them each time. I forget the details but the folded taper design was not that complicated or hard to build. Even more surprisingly they seemed to be about as sensitive (efficient) as the original ported JBL factory enclosure. But they had MUCH better frequency response, not only flatter but a LOT deeper, way more than I ever expected, honestly deeper and flatter than anything I ever heard back then and frankly few I have heard since. The result was a lot bigger than the JBL speakers, roughly 14" wide, 20" deep and 48" tall and heavy being made of 1" HDF. I came across a design for a 10" TL back in 1981 that I built using the 10" woofer from my JBL L-26 speakers. We announced our second quarter 2022 results on Wednesday 27 July.
0 Comments
Leave a Reply. |