Hi everbuddy.Whazup?
You see the top cabinet of this loudspeaker(attachment),the Wilson Watt/Puppy.The top(the watt) is a pyramidal staved container where the front and back are at an angle of 15 degrees(for driver aligment) whereas the sides are at an angle of 10 degrees.
This obviously isn’t your even upside down flower planter.In such a case one can just plug in the number of sides and cant of the desired container to get the proper compound miter angles to cut.The difference in angles here with this cabinet,however, throws a wrench into the works for me.
How would one proceed with the construction of this cabinet?
Thanks tons for any insight,Roland.
Replies
Roly,
Not sure if this is what you're looking for but the basic formula is presented in the following article: http://www.woodcentral.com/bparticles/miter_formula.shtml
Hope it is what you are after.
Doug
Doug thanks for the help.I don't think this applies,though,as the tilt B appears to be the same on each side of the drawing here.They offer no other tilt variable.
In regards to the speaker cabinet there should be two variables for the tilt,one for 10 degrees and one for 15 degrees when plugged in.
There seems like there should be a formula for such a shape.It appears Euclidean,however,I don't really know.The easiest way to approach it from my limited standpoint would be the empiracle way,cut and try.I feel that is cheating though.I get a guilty conscience.Thanks very much again.Roland.
At first I thought this was really just an upside down planter problem, but it's not. It's a quite difficult math problem and it would take me quite a while to derive some formulas. Luckily, FWW published an article on how to do it graphically. The article shows how to determine the miter angle and blade tilt for a box that has constant sloped sides and also for a box where the side slopes are different on different sides. See FWW Issue 76 (May/Jun 1989). It's also been reprinted in one of the "Best of FWW" series.
Ben thanks.I'll check it out.
Just in case anyone thought woodworking is expensive, the WATT/Puppy 5.1 lists for a bit over $16k per pair. And that's not necessarily considered expensive (though I do), as you can go way higher without trying. That's just for the loudspeakers; you still need source, amplification, etc. that can do them justice.
I've given up high-end audio and taken up sailing. It's cheaper.
Be seeing you...
Tom,
I am working on version 3/2 which supposedly set the standard for its day,late eighties.They can be had on Audiogon for around 2-3k.
I think this cabinet,the watt,had alot to do with its success.Limited baffle diffraction,driver centers aligned acoustically,and due to the non-parallell sides,limited cabinet standing waves trying to get back out through the cone.
Once I figure out the construction of the watt I'll have no problem with the puppy.
The next cabinet I would like to attempt is the Avalon Eidolon.I love those facets.It will be even harder than the watt.Thanks,Roland.
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