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4th order bandpass

Old Jan 11, 2007 | 05:31 PM
  #11  
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i will make it if i have the plans
Old Jan 11, 2007 | 08:11 PM
  #12  
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OK here is a little sketch don't laugh its just rough. Works well though like I said with most 10's and its based on 3/4" MDF all dimensions are internal. Port has to stay 2" from start to finsh so that port baffle has to also be 2" from the back panel. If you have any questions let me know. Its roughly tuned to 38-40Hz.

Last edited by Brad-S.A.; Jan 30, 2007 at 01:45 PM.
Old Jan 11, 2007 | 09:44 PM
  #13  
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Originally Posted by Smartass
OK here is a little sketch don't laugh its just rough. Works well though like I said with most 10's and its based on 3/4" MDF all dimensions are internal. Port has to stay 2" from start to finsh so that port baffle has to also be 2" from the back panel. If you have any questions let me know. Its roughly tuned to 38-40Hz.
if i did a 3" round port how long would it be
so the sealed box is .73cft and the ported side is 1.1 how long would the port be going out of the box ?
Old Jan 11, 2007 | 09:57 PM
  #14  
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Here is a side cut away. It utilizes a slot port.

Last edited by Brad-S.A.; Jan 30, 2007 at 01:45 PM.
Old Jan 11, 2007 | 10:04 PM
  #15  
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i'm going to make a boxs with an egg looking box on top with the port going out of it
Old Jan 11, 2007 | 10:14 PM
  #16  
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Not understanding?
Old Jan 12, 2007 | 10:26 AM
  #17  
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Enclosures with an S (Response Curve) value of 0.4 will be the smallest in size, have the widest response range but will have a dip of approximately 2.7 db in the middle of the response curve. An enclosure with an S (Response Curve) of 0.7 will have a larger box, narrower response range, but will generate a flat response curve. The following calculations are based on a value of 0.7 for S.

Lower 3db Rolloff: 30.00 Hz
High 3db Rolloff: 74.43 Hz

Sealed Section: 1.71 cubic feet
= 2952.86 cubic inches
= 48.39 liters

Ported Section: 0.77 cubic feet
= 1329.86 cubic inches
= 21.79 liters

Tuning Frequency: 47.25 Hz

Round Port
Port Diameter: 3.00 inches ( 76.20 mm)
Port Length: 8.87 inches (225.36 mm)
Old Jan 12, 2007 | 02:50 PM
  #18  
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Lightbulb

^ Using TermPro/TermLab?
Old Jan 12, 2007 | 03:00 PM
  #19  
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can you try this 1 cft sealed box with a 1.5 cft ported side box how long is the port
Old Jan 12, 2007 | 03:13 PM
  #20  
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Originally Posted by Smartass
Not understanding?

not supposed to understand zzzzzz's thinking

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