Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: Midbass Horns and Real Estate.
Post Subject: Condensation issue's in BostonPosted by miab on: 10/23/2009
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Since your drivers would contain metal and your are mounting them in an unconditioned space, the warm air (in winter) from the conditioned space ( the listening room) would condense on the the first cold surface within the horns. The wood horn would also condense on the inside but you might not be so concerned as the drying factor and tolerance of wood/plywood to moisture is not as critical as metal. You must contain the entire horn and driver within conditioned space. This would effectively (because the horns are so large) turn the attic into conditioned space. Even if you insulated the horns on their exterior surface, in summer because of interior air conditioning, condensation would collect on the exterior of the horn under the insulation. That is even worse because the moisture would be trapped with no drying factor. Ideal the home would be entirely cathedral ceilings and you can create a partition if necessary to isolate your sound room. Nothing wrong with horns hanging above the dining room table or the bedroom in the other room?
Turning the attic into condioned space is straightforward. Remove insulation in ceiling joists and polyurathane the underside of the roof leaving 1" or 2" of breathing space from soffit to a ridge vent at the peak. But if going through this trouble might as well open the ceiling to view the presumably lovely horns.Rerurn to Romy the Cat's Site