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<blockquote data-quote="sundownz" data-source="post: 8328952" data-attributes="member: 549523">I measured a production v.2 and a newly re-built v.3 with the final compliance side-to-side with the same amount of play time (neither is fully broken-in). Just to compare... looks like we nailed the stiffness based on FS... and we see a drop in Qts due to the higher BL (also higher sensitivity) :<img src="http://www.sundownaudio.com/misc/protos/SA-8/v3_Version/WooferTester_Specs/IMAG1185.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />BL^2/RE = 70.17<img src="http://www.sundownaudio.com/misc/protos/SA-8/v3_Version/WooferTester_Specs/IMAG1243.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />BL^2/RE = 85.78-----I don&#039;t trust the Woofer Tester as an &quot;end all be all&quot; of spec measurement either so don&#039;t read too far into it... but comparing on the same day back-to-back I can tell if my design goals are being met //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifThe spec on our web-site for the SA-8 v.2 was done with a Klippel machine after full break-in for reference.</blockquote>

[QUOTE="sundownz, post: 8328952, member: 549523"] I measured a production v.2 and a newly re-built v.3 with the final compliance side-to-side with the same amount of play time (neither is fully broken-in). Just to compare... looks like we nailed the stiffness based on FS... and we see a drop in Qts due to the higher BL (also higher sensitivity) : [IMG]http://www.sundownaudio.com/misc/protos/SA-8/v3_Version/WooferTester_Specs/IMAG1185.jpg[/IMG] BL^2/RE = 70.17 [IMG]http://www.sundownaudio.com/misc/protos/SA-8/v3_Version/WooferTester_Specs/IMAG1243.jpg[/IMG] BL^2/RE = 85.78 ----- I don't trust the Woofer Tester as an "end all be all" of spec measurement either so don't read too far into it... but comparing on the same day back-to-back I can tell if my design goals are being met [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] The spec on our web-site for the SA-8 v.2 was done with a Klippel machine after full break-in for reference. [/QUOTE]

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