rkeman Messages: 78 Registered: March 2010 Location: Florida
Viscount
The now absolete Eminence H290 had hollowed areas that were filled with electrician's putty on my 3 Pi and 6 Pi builds. Adhesive backed 1/2" acoustic foam insulation cut into four roughly triangular shapes were used to cover the remaining flatter areas of the horn flares. The narrow end of the throat (hollows filled with putty) was additionally wrapped circumferentially with a 2 1/2" strip of the same acoustic foam and secured with a few passes of nylon twine. The resulting horns were incredibly well damped and produced only the dullest thud with a strong tap of the horn mouth. The new H290C may not benefit as much from such treatment if the native structure is sufficiently inert.
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