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Car Audio Equipment
Subwoofers
12" vs 15"
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<blockquote data-quote="VWBobby" data-source="post: 7368720" data-attributes="member: 624844"><p>That article was supposed to prove what? That added mass slows down the woofer below 700hz and "pretty much equal" (NOT!) above 700hz?</p><p></p><p>"Note the red and blue - raw and mass loaded, respectively. They are pretty much equal from 700 Hz and up</p><p></p><p>(I assume we all accept the Fourier transforms, and that the Fs/efficiency of the driver is affected by the</p><p></p><p>added mass, accounting for the differences down low."</p><p></p><p>I think its a stupid test, because most people only play their woofers to 500hz at most, and since this is a Subwoofer question, we generally don't play above 80hz at most. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif At 80hz, a 28 gram difference creates a huge transient response deadener, of sorts. Look at how the added mass affects the peaks and valleys in the blue lines on those graphs.</p><p></p><p>Smaller cones are more accurate because they are easier to control. You can create a lighter cone that is just as rigid as a larger cone, because you don't have the leverage on the cone from the former and surround. (less distance from former to surround) Since the cone is lighter, it has an inherently higher transient response. Transient response and sensitivity are some of the greatest factors in SQ, imho.</p><p></p><p>The output of a smaller cone is going to be less, yes. Increase the number of cones (woofers) and the problem is solved, without the sacrifice of sound quality/transient response. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="VWBobby, post: 7368720, member: 624844"] That article was supposed to prove what? That added mass slows down the woofer below 700hz and "pretty much equal" (NOT!) above 700hz? "Note the red and blue - raw and mass loaded, respectively. They are pretty much equal from 700 Hz and up (I assume we all accept the Fourier transforms, and that the Fs/efficiency of the driver is affected by the added mass, accounting for the differences down low." I think its a stupid test, because most people only play their woofers to 500hz at most, and since this is a Subwoofer question, we generally don't play above 80hz at most. [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] At 80hz, a 28 gram difference creates a huge transient response deadener, of sorts. Look at how the added mass affects the peaks and valleys in the blue lines on those graphs. Smaller cones are more accurate because they are easier to control. You can create a lighter cone that is just as rigid as a larger cone, because you don't have the leverage on the cone from the former and surround. (less distance from former to surround) Since the cone is lighter, it has an inherently higher transient response. Transient response and sensitivity are some of the greatest factors in SQ, imho. The output of a smaller cone is going to be less, yes. Increase the number of cones (woofers) and the problem is solved, without the sacrifice of sound quality/transient response. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Cheers. [/QUOTE]
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Subwoofers
12" vs 15"
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