Don't see the Vas for the Es. The C has stiffened up a bit as Fs is high and Vas low, which I imagine is due to the spider, though sometimes the surround goop can too. Acetone will loosen the latter up, but unless GPA knows a trick or two, might be SOL on the spider.Originally Posted by cradeldorf
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
GM, what's with the "Golden Rule"? Is the inside of my speaker doing the same thing as the inside of my listening room with nulls, nodes, voids, and/or standing waves (and evidently eigenmodes) being created by the sound waves bouncing back and forth off of the top/bottom, side/side and front/back panels and you don't want the speaker positioned in the dead center of the front baffle and having any frequencies canceled out?
Correct, the cab is a miniature building both inside and outside, so adheres to the same acoustical physics. Note that peaks/nulls can't be cancelled out, only averaged out by shifting them to many more smaller amplitude ones that will in turn decay away more rapidly due to being lower in energy.
Inside the cab can be damped of course, but always best to keep it to a minimum IME, so while using an offset is primarily for the exterior, you 'kill two birds with one stone'.
Making as many different path-lengths to the various boundaries as practical does this. A circle with a sound source dead center will radiate in a virtually infinite number of peaks/nulls all at the same frequencies, so with a large baffle this can be quite audible as they comb filter with the driver's output.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
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