![]() Where they differ is that the book formula tells me the F-3dB is 52 Hz (equal to the driver's free air Fs), a Fbox of 84 Hz and essentially no dB rise at Fbox. According to my spreadsheet, a chamber of 13 7/8"x5.5"x8" will give me a Qbox of 0.707. The EBP for the driver is 101 which is supposed to be great for vented boxes but not as well suited for sealed. Sounds like a recipe for left-middle-right to me. ![]() It was the discussion of this pattern in the crossover section of the book that got me interested in this design, and anyhow I'm sitting on six of these woofers I got for an earlier project that remains unfinished. I could use just one woofer per vented box which would bring my internal dimensions to 28.5"x 5.5"x8.7" which is not unreasonable, but not have the dispersion pattern of the twin woofer design. Marie pointed out that if I locate them under the CD racks, the right speaker will get whacked by the bottom of the front door. So much for that concept improving the WAF.
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