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<blockquote data-quote="sundownz" data-source="post: 3491250" data-attributes="member: 549523"><p>I just finished one. Will be making another the same way.</p><p></p><p>Specs as follows with RE 4-layer flat-wind coil D1 configuration and soft spiders:</p><p></p><p>RE (series) = 1.75 Ohms</p><p></p><p>Fs = 28.7 Hz</p><p></p><p>Qes = 0.423</p><p></p><p>Qts = 0.397</p><p></p><p>Qms = 6.461</p><p></p><p>Le (1 khz) = 1.08 mH</p><p></p><p>VAS = 39.25 L</p><p></p><p>BL = 12.22 N/A</p><p></p><p>Cms = 153.59 uM/N</p><p></p><p>Mms = 199.8 grams</p><p></p><p>Should sound quite good. The BL^2 / Re is 85 which is right around where many good sounding woofers sit (not over motored).</p><p></p><p>If you want to continue using it as an SPL sub I highly suggest an 8-layer flatwind... but a 4-layer, as you see, turns it into a very daily friendly type sub. I *did* break it in before measuring these specs as well, FYI.</p></blockquote><p></p>
[QUOTE="sundownz, post: 3491250, member: 549523"] I just finished one. Will be making another the same way. Specs as follows with RE 4-layer flat-wind coil D1 configuration and soft spiders: RE (series) = 1.75 Ohms Fs = 28.7 Hz Qes = 0.423 Qts = 0.397 Qms = 6.461 Le (1 khz) = 1.08 mH VAS = 39.25 L BL = 12.22 N/A Cms = 153.59 uM/N Mms = 199.8 grams Should sound quite good. The BL^2 / Re is 85 which is right around where many good sounding woofers sit (not over motored). If you want to continue using it as an SPL sub I highly suggest an 8-layer flatwind... but a 4-layer, as you see, turns it into a very daily friendly type sub. I *did* break it in before measuring these specs as well, FYI. [/QUOTE]
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