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In Reply to: RE: Yet another problem room.. posted by josh358 on March 05, 2012 at 05:08:49
Haha, I did not mess with the edges. In fact, these old MMGs (made in 1999) still have the original edges. The Stixbees -- just 1x2x42 red oak sticks -- are hidden under the cloth, right next to these edges, on the back.
My wife absolutely did not want wood frames. A good friend also insisted they were ugly. Later, the same friend would joke: Desperate Husbands, episode 1, Man escapes to Home Depot, invents cheap stealth solution, recovers love of his life for $21 bucks. [She was happy about the solution and named them Stixbees. Her mood, when I was experimenting with the really ugly P-Frames, had been deteriorating...my dinners just didn't taste as good as they used to.]
Corian I would have loved to be able to try. Getting it in custom-made shapes is not cheap. I must say, my wife would have been delighted to serve dinner on the speakers!
Follow Ups:
I wondered where that name came from. :-)
How about sand-filled metal reinforcements? For both mass and stiffness.
"How about sand-filled metal reinforcements? For both mass and stiffness."
I would expect it to work if stiff enough metal tubes are used in a proper fashion. What these would be, I have no idea. Perhaps Grant knows more.
JBen's "Rinky Dinky Sounds Lab" has just one more related test remaining. I just ordered some Brazilian Teak (Cumaru) for the final version of the Stixbees. Red Oak does a great job as it is. So, I may get little or no additional benefit from the new wood. Yet, if my theory is right, there should be enough improvement that can be measured relative to the previous versions. It is over 60% stiffer than Red Oak.
I'm thinking of some square-profile aluminum that I see at Home Depot. Might be the right size. It isn't particularly heavy, but I imagine that the sand would damp out any resonances, and the profile should confer very good stiffness. Easy to drill, cut, and join. Then all you'd need is a beach. (Of course, Mye stands would be better, but I'm thinking of something that's inexpensive and easy to DIY.)
I wonder which ones you saw at Home Depot. The ones I looked into at both HD and Lowe's seemed too flexible. This turned me off at the time I was choosing something for the experimental P-Frames. When I compared them -- by not quite scientific means --, 4' of 2x2 Douglas Fir "rang" and vibrated less than the same lengths of aluminum tubing that they had at the time, years ago.Except that I did not know it was Douglas Fir then. It was just a cheap wood that they had on the shelves, with no identity. I bought it on impulse. After they cut it for me, I walked to the hardware section and compared to the 4' aluminum tubes.
There's a story behind me not knowing that it was Douglas Fir for a long time. It turned into one hell of a blind test down the road and led me to the conviction the stiffness has more influence than mass, even as both help.
Edits: 03/06/12 03/06/12
I'd expect the aluminum tubes to ring like a bell, but that's when they aren't damped by sand and the speaker frame. That's the advantage of using disparate materials constrained in a sandwich -- if the resonances occur at different frequencies, they'll tend to damp one another.
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