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Car Audio Equipment
Subwoofers
More efficient subs=more spl?
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<blockquote data-quote="Electrodynamic" data-source="post: 7885248" data-attributes="member: 548723"><p>For car audio specific topics high sensitivity isn't necessarily a good thing as a high sensitivity woofer actually has <em>less</em> output in a small sealed box than a less "efficient" woofer.</p><p></p><p>Both of these images came from the Technical section of one of my web pages (Stereo Integrity). Here are two completely different woofers in the same size box. One woofer is 84 dB efficient and the other one is 97 dB efficient. The first graph will be of the two woofers in 1 ft^3 sealed:</p><p></p><p><img src="http://www.stereointegrity.com/images/Efficiency.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The second graph is of both woofers in 3 ft^3 sealed:</p><p></p><p><img src="http://www.stereointegrity.com/images/Efficiency2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Notice I haven't told you which woofer is which plotted line yet. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif The blue plotted line is the 97 dB woofer and the black plotted line is the 84 dB woofer. Notice that in 1 ft^3 below ~45 Hz the less efficient woofer has <em>more</em> output compared to the other woofer that has a +13 dB higher efficiency! In a small enclosure (which all car audio alignments are) a "less efficient" woofer will actually have more actual output where it matters than a higher efficiency woofer. If you want to listen to kick drums all day long then a much larger sealed, or vented, alignment coupled to a higher efficiency woofer might be a suitable option for you. The point is that if you are looking for woofers that have upwards of 90 dB efficiency ratings you must be ready for a large enclosure in order to get the benefits from it.</p></blockquote><p></p>
[QUOTE="Electrodynamic, post: 7885248, member: 548723"] For car audio specific topics high sensitivity isn't necessarily a good thing as a high sensitivity woofer actually has [I]less[/I] output in a small sealed box than a less "efficient" woofer. Both of these images came from the Technical section of one of my web pages (Stereo Integrity). Here are two completely different woofers in the same size box. One woofer is 84 dB efficient and the other one is 97 dB efficient. The first graph will be of the two woofers in 1 ft^3 sealed: [IMG]http://www.stereointegrity.com/images/Efficiency.jpg[/IMG] The second graph is of both woofers in 3 ft^3 sealed: [IMG]http://www.stereointegrity.com/images/Efficiency2.jpg[/IMG] Notice I haven't told you which woofer is which plotted line yet. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] The blue plotted line is the 97 dB woofer and the black plotted line is the 84 dB woofer. Notice that in 1 ft^3 below ~45 Hz the less efficient woofer has [I]more[/I] output compared to the other woofer that has a +13 dB higher efficiency! In a small enclosure (which all car audio alignments are) a "less efficient" woofer will actually have more actual output where it matters than a higher efficiency woofer. If you want to listen to kick drums all day long then a much larger sealed, or vented, alignment coupled to a higher efficiency woofer might be a suitable option for you. The point is that if you are looking for woofers that have upwards of 90 dB efficiency ratings you must be ready for a large enclosure in order to get the benefits from it. [/QUOTE]
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Subwoofers
More efficient subs=more spl?
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