Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: "...the wall where horns will be sliding into..."Posted by Paul S on: 6/25/2010
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If your wording reflects a plan to pre-fab the horns on the ground (or maybe even in a shop...), then good for you.
IMO, it would be FAR preferable to pre-fab the horns on the ground, drag them in through the double doors, winch them up (look at any old hay barn...), and pull them back into a pre-prepared open space (or spaces). Again, all those compound curves and blending of mis-matched sections will be hard enough to do if one could walk around and around the horns, with continuous access to all tools and materials, while building them. I make no secret of my particular skepticism about large "sheets-of-plywood" horns, but I am NOT being negative when I say it would be a Hell of a task - for anyone - to build (and tune...) those horns up in the space where they will reside. As for tuning, back in my savage horn days, we used to try to tune the horn profiles with model maker's "clay". I never really solved the problems I wanted to at once, but it can take very little clay in the "right place" to change the sound quite a bit, and it could also be re-worked as we went along.
If the ceiling spans under the horns have bearing walls under them, then 2 X 6 joists might hold plenty. If clear spans, you MIGHT get by with a king "rod" holding the ceiling joists up in the middle, under the ridge. Calculating allowable dead and live loads from standard UBC tables is not rocket science.
Best regards,
Paul SRerurn to Romy the Cat's Site