Zene Posted February 11, 2006 Share Posted February 11, 2006 Was contemplating doing stacked half Jubilees, but now seems quite different from one 2x12 horn. Is two drivers in one large back chamber and acting as a manifold firing into one large horn the same as two individual stacked horns? Thanks DM for pics. Zene Quote Link to comment Share on other sites More sharing options...
DrWho Posted February 12, 2006 Share Posted February 12, 2006 As far as the back chamber is concerned, yes the volume can be cut in half and isolated from each woofer. But the front of the horn would have to remain mostly the same - since hornloading is a function of cross-sectional area. In other words, it would be pointless to build a "half jubilee" because it will end up being the same size...you'll just be a woofer short. It's a bit more complicated because the design is built around two drivers, so you would really need to do some modifications to the horn as well - and then it's not really a jubilee anymore. What are you trying to accomplish by cutting the horn in half? If it's easier mobility, why don't you just put castors on the rear and cart the bass bin around like a wheelbarrow? Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted February 12, 2006 Share Posted February 12, 2006 not to hijack the thread but where are good instructions on how to build the jubilee? Quote Link to comment Share on other sites More sharing options...
Zene Posted February 12, 2006 Author Share Posted February 12, 2006 Dr Who ... thanks. Be carefull where you land; ref: "Phone Booth" movie. Main goals are: Easier to build and versitility to test different speakers without buying four. Two stacked will be the same as one double. Three stacked per side? Ok! Ok! I am making a master dado gig for ends to ease assy. Four should be just as easy to build as two large. Casters? I use the regular large round chair ones. Drill out hole in ball slightly and stud will pull out easily. Move speaker wherever you want (sometimes is only inches), raise each corner and remove casters. You now have cheap version of cones. Very solid. (Slip over locking points?) Tough on carpet or floors. I'm sure good coasters can be devised. Jay, search (Jubilee) this forum .... first thread starts 3-29-05. Read all you can, do not just start building from final plan. Without Bert's superior work (D-Man,too) it would be vary hard to construct, but drawing is cad based, not plan drawing based. You will see. Not sure all who has actually built one. Big D has. No doubt I will be updated ........thx. Search in AES Journal for copy of "A Revised Low-Frequency Horn of Small Dimension" for Roy and Paul's original paper on the Jubilee. History is always good. You do know Klipsch never made a home version. Do not use their PA version drivers for home, per eMail from Klipsch. Makes finding a good driver almost impossible. Is all an educated guess. eMail me if you want. Would like to hear from current builders. Zene zene@comcast.net Quote Link to comment Share on other sites More sharing options...
Jay481985 Posted February 12, 2006 Share Posted February 12, 2006 ah autocad lol I love building random things and even solving math problems in high school using that program Quote Link to comment Share on other sites More sharing options...
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