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I think some of you might be interested in John Crabbe's concrete 25Hz basshorn.
hi wayne, hmmn can't get a bigger file size in the yahoo photo album so can either e-mail to someone who can host them or put them in a folder eveyone can download from kazaa. interesting that the article alludes to an even bigger, less compromised, underfloor horn. just might build these one day as the build doesn't look hard and they model well in mcbean with a fane studio 15 i bought for 25.00 sterling by the way that karlson project i did with altec 806/811's , le5's /edgarmid and evm15ls ended up sounding best as a two way crossed at 800, pretty much like you said it would thanks gazza
i will upload images as i get time page 1 is up..5 to to go gazza http://gallery.audioasylum.com/cgi/upload.mpl?u=19384&f=crabbe300dpi1.jpg&v=f&UserImages=19384&session=&invite=&w=953&h=1230
I had a 1960s hifi book with an inwall design,30hz expo :-) My jbl horn-im getting a quote tomorow 2 18mm MDF sheets! 360litres! 50hz low excursion , F3-~40hz :-) Super midbass! Details at homepage -homepage-
That's a really, really cool website Mike. Thanks for the link!
Thanks for reloading the images files in hi-res. Thanks a lot!
more info on the bass horns and how (...but not why?!?!?) the author made a set of midrange horns with another set of b139 bass drivers (tee hee!) gazza
Oh its F3=35hz and 47hz loading with the extra 30cm of path length moving it up to 226cm Expo length Cheers!