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4th. order bandpass
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<blockquote data-quote="82 cutlass" data-source="post: 7205954" data-attributes="member: 561239"><p>I came up with this for 4 12's . It's 11 cubes I don't want to go any bigger . I want to save some room for the air ride stuff . If i do 4 12's it's going to be a 3 chamber bandpass . Should I separate each woofer in it's own box or will 2 sharing the same side be ok ? This is my first multiple sub bandpass...wanna make sure i do it right .</p><p></p><p>Number of drivers : 4</p><p></p><p>Box type : 4th Order Bandpass</p><p></p><p>Box size : Front chamber 6.000 ft^3</p><p></p><p>Rear Chamber 5.000 ft^3</p><p></p><p>Tuning frequency : 50.00 Hz</p><p></p><p>Vent : 1 vent(s) -&gt; Front Chamber</p><p></p><p>10.52 in length for each</p><p></p><p>24.00 x 5.00 in rectangle</p><p></p><p>Relative</p><p></p><p>Freq Gain SPL</p><p></p><p>[Hz] [dB] [dB]</p><p></p><p>20.00 -16.28 112.50</p><p></p><p>25.00 -10.61 118.17</p><p></p><p>30.00 -5.11 123.67</p><p></p><p>35.00 -0.09 128.70</p><p></p><p>40.00 2.45 131.23</p><p></p><p>45.00 2.07 130.85</p><p></p><p>50.00 1.11 129.89</p><p></p><p>55.00 0.38 129.16</p><p></p><p>60.00 -0.13 128.65</p><p></p><p>65.00 -0.57 128.21</p><p></p><p>70.00 -1.09 127.70</p><p></p><p>75.00 -1.77 127.01</p><p></p><p>80.00 -2.66 126.12</p><p></p><p>85.00 -3.71 125.07</p><p></p><p>90.00 -4.88 123.91</p><p></p><p>95.00 -6.08 122.70</p><p></p><p>100.00 -7.29 121.50</p></blockquote><p></p>
[QUOTE="82 cutlass, post: 7205954, member: 561239"] I came up with this for 4 12's . It's 11 cubes I don't want to go any bigger . I want to save some room for the air ride stuff . If i do 4 12's it's going to be a 3 chamber bandpass . Should I separate each woofer in it's own box or will 2 sharing the same side be ok ? This is my first multiple sub bandpass...wanna make sure i do it right . Number of drivers : 4 Box type : 4th Order Bandpass Box size : Front chamber 6.000 ft^3 Rear Chamber 5.000 ft^3 Tuning frequency : 50.00 Hz Vent : 1 vent(s) -> Front Chamber 10.52 in length for each 24.00 x 5.00 in rectangle Relative Freq Gain SPL [Hz] [dB] [dB] 20.00 -16.28 112.50 25.00 -10.61 118.17 30.00 -5.11 123.67 35.00 -0.09 128.70 40.00 2.45 131.23 45.00 2.07 130.85 50.00 1.11 129.89 55.00 0.38 129.16 60.00 -0.13 128.65 65.00 -0.57 128.21 70.00 -1.09 127.70 75.00 -1.77 127.01 80.00 -2.66 126.12 85.00 -3.71 125.07 90.00 -4.88 123.91 95.00 -6.08 122.70 100.00 -7.29 121.50 [/QUOTE]
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