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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: The screws subject and the sections join subject.Posted by Romy the Cat on: 7/27/2010
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Here is the subject that makes anyone who does what we are trying to do wondering: do remover the screw from wood or not. Our leading position is the screw will be removed. We use long 5-7 inch double threaded screws that bund wood stronger than regular screws. We use screws however, as a replacement for clamping as some of my horn surfaces are not clampable. We use expendable polyurethane glue and 24 hours after the glue is solidified the screws are removed. The dowel joints will be use somewhere but I am not too thrilled about them. I feel that the biggest strength of the horn will come from the frame that will be shaped by ever-lying 2x4 and 2x3 brasses. The polyurethane glue will bond all of it very strongly. The point to remove the screws is to remove from the wood alien surface that would have different sound speed. Will it be effective on the horn operating frequency? I do not know and I think it does not matter. If someone has any experience on it then please comment.
Another subject is my inner-conflict. I have no judgment if I need to glue the sections. It will be 3 section and the will be attached by very strong bolts. My carpenter feels the there is nothing stronger then wood against wood bolted tight. I feel that it is incorrect and that the sections need to be glued in addition to bolts. The same is applicable to the connection of back chamber to the horn. Sure if I do so them the horn will be absolutely not removable and meant to end its live along with house. Well, I think to remove this horn will be more expensive then to build a new one anyhow… So, I am inclined to glue the sections in addition to bolting them…
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