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<blockquote data-quote="sundownz" data-source="post: 7835962" data-attributes="member: 549523"><p>I am making one small change for production -- the pole extension is growing by about 1/2" -- I was able to shoot the coil completely out of the gap and scrape the winding on the top plate with about 3x rated power</p><p></p><p>With the extension pushed out that will become impossible at any power level -- as it would take over 30mm one-way to completely jump over the pole with the taller extension.</p><p></p><p>Had to push back this production run a bit to fit a few more things in; but I'd expect to see it in November to December.</p><p></p><p>Specs on the unit played for extended period in my car :</p><p></p><p>Re : 6.03 ohms (series)</p><p></p><p>Fs : 45.2 Hz</p><p></p><p>Qes : 0.63</p><p></p><p>Qms : 7.31</p><p></p><p>Qts : 0.58</p><p></p><p>Le : 6.26 mH</p><p></p><p>Sd : 30.68 in^2</p><p></p><p>Vas : 7.74 L</p><p></p><p>BL : 15.55 NA</p><p></p><p>Mms : 89 g</p><p></p><p>Cms : 138 uM/N</p><p></p><p>Sens 1w/1m : 82.29 dB</p><p></p><p>Box modelling programs will call for a bit over 0.5 each sealed -- I ran these in 0.25 each and they sound great. Being a very linear driver over stroke your Qtc at higher levels of travel would be about the same as a driver with a lower at-rest Qtc and non-linear CMS and BL curves.</p><p></p><p>In any event -- the specs are within a VERY small margin of my original test-bench break-in process on them... so the parts will show very little fatigue and change over time after initial break-in. Not a surprise as they were all designed around the much more powerful SA-8 v.2</p><p></p><p>They would have no issue with a ported box but I feel like their main advantage is performing better sealed than an SA-8 v.2</p><p></p><p>Also will be doing Klippel testing on this at some point as I've done with the SA-8 v.2 and SA-12 models.</p><p></p><p>PS: I notice I haven't mentioned one of the details yet... the former is an alloy material similar to brass with a spiral cut to help reduce eddy currents compared to a standard aluminum former.</p></blockquote><p></p>
[QUOTE="sundownz, post: 7835962, member: 549523"] I am making one small change for production -- the pole extension is growing by about 1/2" -- I was able to shoot the coil completely out of the gap and scrape the winding on the top plate with about 3x rated power With the extension pushed out that will become impossible at any power level -- as it would take over 30mm one-way to completely jump over the pole with the taller extension. Had to push back this production run a bit to fit a few more things in; but I'd expect to see it in November to December. Specs on the unit played for extended period in my car : Re : 6.03 ohms (series) Fs : 45.2 Hz Qes : 0.63 Qms : 7.31 Qts : 0.58 Le : 6.26 mH Sd : 30.68 in^2 Vas : 7.74 L BL : 15.55 NA Mms : 89 g Cms : 138 uM/N Sens 1w/1m : 82.29 dB Box modelling programs will call for a bit over 0.5 each sealed -- I ran these in 0.25 each and they sound great. Being a very linear driver over stroke your Qtc at higher levels of travel would be about the same as a driver with a lower at-rest Qtc and non-linear CMS and BL curves. In any event -- the specs are within a VERY small margin of my original test-bench break-in process on them... so the parts will show very little fatigue and change over time after initial break-in. Not a surprise as they were all designed around the much more powerful SA-8 v.2 They would have no issue with a ported box but I feel like their main advantage is performing better sealed than an SA-8 v.2 Also will be doing Klippel testing on this at some point as I've done with the SA-8 v.2 and SA-12 models. PS: I notice I haven't mentioned one of the details yet... the former is an alloy material similar to brass with a spiral cut to help reduce eddy currents compared to a standard aluminum former. [/QUOTE]
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