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Old 4th November 2019, 02:35 PM   #21
bjorno is offline bjorno  Sweden
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Hi umut1001,All

FYI:

b
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Old 4th November 2019, 07:28 PM   #22
umut1001 is offline umut1001  Europe
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shallow subwoofer options
Hi Bjorno!
Thank you for your help!I just came home and saw your project. It seems SB34 will not fit well in this box.
But there is good news! I have talked to wife now and she give permittion for a deeper box.I will buy some extra little furnitures for home and got permittion this way (now we dealed for 23cm wide,104cm high and 39cm deep)
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Old 5th November 2019, 10:06 AM   #23
umut1001 is offline umut1001  Europe
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Default Hornresp calculations-filling

Hi.I made some calculations for the bigger box.Thank you
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Old 5th November 2019, 07:50 PM   #24
umut1001 is offline umut1001  Europe
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shallow subwoofer options
Hi.I read that polyfiber is not good for stuffing so i decided to buy some acoustic foam.At Bauhaus i found these ones attached.50x50cm and at different heights 7cm ,5cm and 4cm.(I found cheaper ones on internet though)
@Bjorno you stuffed end and beginning of the box.Why did not you fill all the box to increase deep bass SPL? Is it stuffed by polyfiber or acoustic foam?I did not see any information about density of stuffing on your project.And what should be density of acoustic sponge?Is it good to use 50density? There are many types available on internet.
Thank you for your answers.Best regards
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Old 5th November 2019, 10:12 PM   #25
GM is offline GM  United States
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Old 7th November 2019, 08:11 AM   #26
umut1001 is offline umut1001  Europe
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Hi.Ok i am cutting the mdf panels today.
From web site
"A few rules of thumb: Stuff small enclosures – those with up to about 3 cubic feet of internal volume or less – with 1.5 pounds of fiberfill for each cubic foot of internal volume and you should get about a 30-percent increase in box volume without seriously affecting other performance variables"
By
TOM NOUSAINE
RIP
Will fill 1,7kilograms of polyfiber in 68liters of box.
So 68*1,3=88,4liters effective volume.
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