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Re: Interesting

Hi Earl

The CLF is a new standard, an attempt to have a common measurement language for the room acoustic modeling programs.
I now have the preliminary CLF file for the SH50.
It does not have a power rating filled in yet, Pat Brown is still doing that part of it.
I don’t have a personal website so I don’t have a way to link to the file or post it here. Shortly, the files for the SH100 and SH50 will be on the company site but they are not yet linked so I took the liberty of sending you the file directly.

If you install the viewer, you can actually see quite a bit if you poke around.
The balloon view is nice, you can rotate the view and see it from any angle.
Below that, by checking “balloon spectra” and moving the two sliders, one can see a frequency response at any angle through the sphere. Clicking polar, gives you X and Y polar plots at 1/3rd octave centers. Overall directivity can be plotted vs frequency, specified in Q or Di as well as the –6dB angles.

When you look at the off axis response and polar’s, look at 315Hz and 1250Hz, the center of the low / mid and mid / high crossover.
There are no lobes, nothing different than above and below the crossover points, no interference etc..

Actually it has taken a while to figure out how to make these work, no formula’s in the beginning except the ones you “think” might apply and a lot of “interpreting measurements”.
The alignment is not any more temperature sensitive than other speakers, the hard part was figuring out what matters and how to deal with the additional constraints and then how to arrive at a passive crossover that did what it was suppose to.
Anyway, does this look like I described?
Best,

Tom




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