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Nakamichi SP-80
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<blockquote data-quote="SoCalBean420" data-source="post: 8660834" data-attributes="member: 605541"><p>Nakamichi SP-80</p><p> </p><p> <a href="https://www.caraudio.com/classifieds/item/91-nakamichi-sp-80/" target="_blank"></a></p><p><a href="https://www.caraudio.com/classifieds/item/91-nakamichi-sp-80/" target="_blank"> View Listing</a></p><p><a href="https://www.caraudio.com/classifieds/item/91-nakamichi-sp-80/" target="_blank"> </a></p><p> </p><p> </p><p> </p><p> </p><p>Couple of old school drivers. These are more of midbass than subwoofer. Both in perfect working order.</p><p></p><p><strong>Nakamichi SP-80</strong></p><p></p><p>fs = 40Hz</p><p> Qt = .255</p><p> Qes = .268</p><p> Qms = 5.29</p><p> Vas = 1.08 cu. ft. = 1866 cu in. = 30.58 liters</p><p> Xmax = .28 in = 7.0 mm</p><p> Vd = 0.00385 cu ft. = 6.65 cu in. = .11 liters</p><p> Speaker Displacement = .046 cu ft. = 80 cu in. = 1.31 liters</p><p> Re = 4.5Ohms</p><p> No = .9%</p><p> Par (Vented) = 3.0 x (Vd)^2 x (f3)^4 = 3.63e-8 x (f3)^4</p><p></p><p></p><p> </p><p> </p><p> </p><p> </p><p> Ported Enclosure</p><p></p><p> </p><p> Box Volume</p><p> (cu. ft.)</p><p></p><p></p><p> </p><p> f3 (Hz)</p><p></p><p> </p><p> fb (Hz)</p><p></p><p></p><p> </p><p> ripple (dB)</p><p></p><p> </p><p> Par (W)</p><p></p><p> </p><p> 2 Inch</p><p></p><p> </p><p> P.V.</p><p> (cu in)</p><p></p><p> </p><p> 2.5 Inch</p><p></p><p></p><p> </p><p> P.V.</p><p> (cu in)</p><p></p><p> </p><p> 3.0 Inch</p><p></p><p> </p><p> P.V.</p><p> (cu in)</p><p></p><p> </p><p> 0.20</p><p></p><p> </p><p> 95.30</p><p></p><p> </p><p> 73.80</p><p></p><p> </p><p> 1.20</p><p></p><p> </p><p> 2.99</p><p></p><p> </p><p> 8.82</p><p></p><p> </p><p> 28</p><p></p><p> </p><p> 14.23</p><p></p><p> </p><p> 70</p><p></p><p> </p><p> 20.94</p><p></p><p> </p><p> 148</p><p></p><p> </p><p> 0.30</p><p></p><p> </p><p> 76.20</p><p></p><p> </p><p> 63.00</p><p></p><p> </p><p> -0.10</p><p></p><p> </p><p> 1.22</p><p></p><p> </p><p> 7.00</p><p></p><p> </p><p> 22</p><p></p><p> </p><p> 11.4</p><p></p><p> </p><p> 56</p><p></p><p> </p><p> 16.85</p><p></p><p> </p><p> 119</p><p></p><p> </p><p> 0.40</p><p></p><p> </p><p> 65.70</p><p></p><p> </p><p> 56.70</p><p></p><p> </p><p> -1.00</p><p></p><p> </p><p> 0.68</p><p></p><p> </p><p> 6.00</p><p></p><p> </p><p> 19</p><p></p><p> </p><p> 9.83</p><p></p><p> </p><p> 48</p><p></p><p> </p><p> 14.60</p><p></p><p> </p><p> 103</p><p></p><p> </p><p> 0.50</p><p></p><p> </p><p> 58.80</p><p></p><p> </p><p> 52.50</p><p></p><p> </p><p> -1.60</p><p></p><p> </p><p> 0.43</p><p></p><p> </p><p> 5.31</p><p></p><p> </p><p> 17</p><p></p><p> </p><p> 8.75</p><p></p><p> </p><p> 43</p><p></p><p> </p><p> 13.04</p><p></p><p> </p><p> 92</p><p></p><p> </p><p> 0.60</p><p></p><p> </p><p> 53.80</p><p></p><p> </p><p> 49.30</p><p></p><p> </p><p> -2.20</p><p></p><p> </p><p> 0.30</p><p></p><p> </p><p> 4.82</p><p></p><p> </p><p> 15</p><p></p><p> </p><p> 7.99</p><p></p><p> </p><p> 39</p><p></p><p> </p><p> 11.94</p><p></p><p> </p><p> 84</p><p></p><p> </p><p> 0.70</p><p></p><p> </p><p> 50.00</p><p></p><p> </p><p> 46.80</p><p></p><p> </p><p> -2.60</p><p></p><p> </p><p> 0.23</p><p></p><p> </p><p> 4.44</p><p></p><p> </p><p> 14</p><p></p><p> </p><p> 7.39</p><p></p><p> </p><p> 36</p><p></p><p> </p><p> 11.08</p><p></p><p> </p><p> 78</p><p></p><p> </p><p> 0.80</p><p></p><p> </p><p> 47.00</p><p></p><p> </p><p> 44.80</p><p></p><p> </p><p> -3.00</p><p></p><p> </p><p> 0.18</p><p></p><p> </p><p> 4.12</p><p></p><p> </p><p> 13</p><p></p><p> </p><p> 6.89</p><p></p><p> </p><p> 34</p><p></p><p> </p><p> 10.36</p><p></p><p> </p><p> 73</p><p></p><p> </p><p> 0.90</p><p></p><p> </p><p> 44.40</p><p></p><p> </p><p> 43.10</p><p></p><p> </p><p> -3.30</p><p></p><p> </p><p> 0.14</p><p></p><p> </p><p> 3.86</p><p></p><p> </p><p> 12</p><p></p><p> </p><p> 6.48</p><p></p><p> </p><p> 32</p><p></p><p> </p><p> 9.77</p><p></p><p> </p><p> 69</p><p></p><p> </p><p> 1.00</p><p></p><p> </p><p> 42.30</p><p></p><p> </p><p> 41.60</p><p></p><p> </p><p> -3.60</p><p></p><p> </p><p> 0.12</p><p></p><p> </p><p> 3.65</p><p></p><p> </p><p> 11</p><p></p><p> </p><p> 6.15</p><p></p><p> </p><p> 30</p><p></p><p> </p><p> 9.30</p><p></p><p> </p><p> 66</p><p></p><p> </p><p> 1.10</p><p></p><p> </p><p> 40.50</p><p></p><p> </p><p> 41.00</p><p></p><p> </p><p> -3.80</p><p></p><p> </p><p> 0.10</p><p></p><p> </p><p> 3.44</p><p></p><p> </p><p> 11</p><p></p><p> </p><p> 5.83</p><p></p><p> </p><p> 29</p><p></p><p> </p><p> 8.83</p><p></p><p> </p><p> 62</p><p></p><p> </p><p> 1.20</p><p></p><p> </p><p> 38.90</p><p></p><p> </p><p> 39.20</p><p></p><p> </p><p> -4.10</p><p></p><p> </p><p> 0.08</p><p></p><p> </p><p> 3.29</p><p></p><p> </p><p> 10</p><p></p><p> </p><p> 5.60</p><p></p><p> </p><p> 27</p><p></p><p> </p><p> 8.50</p><p></p><p> </p><p> 60<img src="http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164035_zpsg4cjsub0.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164242_zps3unzk0m3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164306_zpscdblhrod.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p> </p><p> </p><p> </p><p> <ul> <li data-xf-list-type="ul"><strong>Advertiser</strong><br /> SoCalBean420</li> <li data-xf-list-type="ul"><strong>Date</strong><br /> 11/07/2018</li> <li data-xf-list-type="ul"><strong>Price</strong><br /> $80.00</li> <li data-xf-list-type="ul"><strong>Category</strong><br /> <a href="https://www.caraudio.com/classifieds/category/3-speaker-classifieds/" target="_blank">Speaker Classifieds</a></li> </ul></blockquote><p></p>
[QUOTE="SoCalBean420, post: 8660834, member: 605541"] Nakamichi SP-80 [URL="https://www.caraudio.com/classifieds/item/91-nakamichi-sp-80/"] View Listing [/URL] Couple of old school drivers. These are more of midbass than subwoofer. Both in perfect working order. [B]Nakamichi SP-80[/B] fs = 40Hz Qt = .255 Qes = .268 Qms = 5.29 Vas = 1.08 cu. ft. = 1866 cu in. = 30.58 liters Xmax = .28 in = 7.0 mm Vd = 0.00385 cu ft. = 6.65 cu in. = .11 liters Speaker Displacement = .046 cu ft. = 80 cu in. = 1.31 liters Re = 4.5Ohms No = .9% Par (Vented) = 3.0 x (Vd)^2 x (f3)^4 = 3.63e-8 x (f3)^4 Ported Enclosure Box Volume (cu. ft.) f3 (Hz) fb (Hz) ripple (dB) Par (W) 2 Inch P.V. (cu in) 2.5 Inch P.V. (cu in) 3.0 Inch P.V. (cu in) 0.20 95.30 73.80 1.20 2.99 8.82 28 14.23 70 20.94 148 0.30 76.20 63.00 -0.10 1.22 7.00 22 11.4 56 16.85 119 0.40 65.70 56.70 -1.00 0.68 6.00 19 9.83 48 14.60 103 0.50 58.80 52.50 -1.60 0.43 5.31 17 8.75 43 13.04 92 0.60 53.80 49.30 -2.20 0.30 4.82 15 7.99 39 11.94 84 0.70 50.00 46.80 -2.60 0.23 4.44 14 7.39 36 11.08 78 0.80 47.00 44.80 -3.00 0.18 4.12 13 6.89 34 10.36 73 0.90 44.40 43.10 -3.30 0.14 3.86 12 6.48 32 9.77 69 1.00 42.30 41.60 -3.60 0.12 3.65 11 6.15 30 9.30 66 1.10 40.50 41.00 -3.80 0.10 3.44 11 5.83 29 8.83 62 1.20 38.90 39.20 -4.10 0.08 3.29 10 5.60 27 8.50 60[IMG]http:////applications/core/interface/imageproxy/imageproxy.php?img=http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164035_zpsg4cjsub0.jpg&key=a9b96b278253ed32f8e368dcf1b0a4afbce0ed24d79f60fc24942355a95665c3[/IMG][IMG]http:////applications/core/interface/imageproxy/imageproxy.php?img=http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164242_zps3unzk0m3.jpg&key=ffc55b7b1d9a3a623bec7f9a9ccaedba24f11616d7646be7c8915382056f6a11[/IMG][IMG]http:////applications/core/interface/imageproxy/imageproxy.php?img=http://i1194.photobucket.com/albums/aa365/SoCalBean420/20181107_164306_zpscdblhrod.jpg&key=e88c16901291fa147de8df023421e4c8479baa7973c73278f5898200cb1b5814[/IMG] [LIST] [*][B]Advertiser[/B] SoCalBean420 [*][B]Date[/B] 11/07/2018 [*][B]Price[/B] $80.00 [*][B]Category[/B] [URL="https://www.caraudio.com/classifieds/category/3-speaker-classifieds/"]Speaker Classifieds[/URL] [/LIST] [/QUOTE]
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