![]() ![]() ![]() The high frequencies would strike metal rails and wooden or plastic ties and hopefully mostly reflect, but I believe there is little effort given to enhancing bass, which is the goal here. I believe that most commercially available sound-equipped locomotives have the speaker in the base, as shown in the attached parts diagram. In the latter case, a large number of small holes are drilled in the coal load, between the chunks, or small bits of wood are loosely arranged on a mesh. The normal options for mounting the speaker are either centered in the frame, facing downward or under the coal or wood load, facing upward. Another photo is of a complete tender, with the trucks (wheel & brake assemblies) attached. The scale is HO (87.1:1) and attached is a photo of some typical tender shells, of injection molded plastic. The two speakers I am looking at are here: I am seeking your advice on designing some enclosures for small full-range speakers to be mounted in model railroad steam locomotives. ![]()
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