Bill, In the article on the small VOTT's, in the section on improving the horns, the first solution done by Altec was to place foam between the webs...that would be the 'fins' of the current discussion, and the foam was placed where the weld on the earlier models was right? The latex paint and sand idea also sounds like it would be very effective. Would you say that either method by itself would be sufficient? I had run into that article a few years ago and had forgotten how informative and useful it was. Thanks again. AstroSonic