Monday, April 7, 2014

Foam Core Midrange Horn

I made a foam core horn using the same mold from the two plywood horns.


Foam Core Midrange Horn
Foam Core Midrange Horn
This is not as rigid as the plywood versions.  The sides resonate a little.  I believe this could be corrected by spraying foam on the horn exterior to stiffen the construction.  This would not add significantly to the weight.  As pictured above, this horn including driver weighs less than one pound.

This type of construction might be applied to the bass horn to reduce the weight.  The basic horn interior horn shape could be built up from foam core and spray foam used to fill in behind the sides to stiffen them.  While still quite large, the bass horn would be light enough to be carried by one or two people.  Maximum dimensions should be less than the standard exterior door opening, about three by seven feet.

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