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Old 11-26-2013, 03:19 PM
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Default psp port length help

I am going to be putting 2 4 inch psp aero ports into a 10 cubic ft box, about 9.6 cubic ft after displacements for an incriminator death penalty 21". I am trying to get as close as i can to 32 hertz tuning, but when i enter in my information to the psp inc calculator it shows a straight length of 3.97 and a flared length of 4.97. I have been looking at all the forums and i cant figure out if my port is supposed to be 4.97 inches total or if thats how long i sshould cut the straight section. Im hoping its how long the straight section should be because just the flares attached to each other is 6 inches long. Any clarification would be greatly appreciated. I've been working on this box off and on for a couple weeks and i want to hear it playing already
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Old 11-26-2013, 03:50 PM
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2 4" ports is not enough for a 21" woofer
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Old 11-26-2013, 04:04 PM
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Why not? Is there no way to make it work? I already have my box built and that's all I have room for
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Old 11-26-2013, 04:06 PM
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Quote:
Originally Posted by BumpinBurban View Post
Why not? Is there no way to make it work? I already have my box built and that's all I have room for
You would have to do an external port... 2 4" ports will certainly work, but it will be far from optimal port area for such a large woofer
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Old 11-26-2013, 04:08 PM
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no way to make it work correctly
2-4" aeros is only 25" of port area, only 2.6" per cube
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Old 11-26-2013, 04:09 PM
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YYou need 90 to 160 sq inches
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Old 11-26-2013, 04:34 PM
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How many more 4 inch ports would have to be added for it to work? I might be able to add another one
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Old 11-26-2013, 04:36 PM
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You would need like 8 total
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Old 11-26-2013, 04:50 PM
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Seriously? I could maybe do 4. Would 2 really sound that bad?
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Old 11-26-2013, 04:53 PM
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2 wouldnt sound "bad" but it will be like breathing thu a cocktail straw ... id suggest at least 96 sq inches... 2 4" ports = 25 sq inch
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