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In the Forum: Horn-Loaded Speakers
In the Thread: Rakeshorns
Post Subject: It is a weak frame in my view.Posted by Romy the Cat on: 10/22/2011
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Well, I still am not thrilled with this frame. Not that I have to be but in my view this frame has some potential to be problematic. I am not a structural engineer and I might be wrong but this is the problem how I see it. Wood is a strong material  and your frame use some kind of stronger wood. That is fine. However is you look at the height of vertical poll and if you attach it 3 more horns then you will understand that the virtual poll of the frame will have a lot of forward puling momentum and all this momentum will be applied to less than one sq feet surface between the frame’s legs and the vertical poll. Even if you glue it you have no room in there to use powerful bolts to hold the things together. If you drive some very deep studs into the poll then it might do but studs will have metal tightening only from one side. So, if you insist to use wood then I would like very much to see a metal triangular plates screw to the wood from both sides of the poll with good 25-30’ extension along the legs. This way the rocking of the frame will not weaken the vertical poll.

Rakeshorns_Frame_triangs.JPG


I have those ribs of stiffens and in my estimation they are mandatory for frame of this type.

Macondo_Frame_ribs_of_stiffens .JPG

The Cat

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