Bandpass box dimensions for a kenwood sub

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=81346
Printed Date: July 07, 2025 at 10:43 PM

Topic: Bandpass box dimensions for a kenwood sub

Posted By: gezzy
Subject: Bandpass box dimensions for a kenwood sub
Date Posted: August 08, 2006 at 4:09 AM

Hi, i have a kenwood KFC - W3003 subwoofer and i would like to put the sub into a bandpass box, i have searched the internet and many different forums for recommended bandpass enclosure dimensions but havent been able to find any, can anyone help? Thanks

Replies:

Posted By: josh1979
Date Posted: August 08, 2006 at 4:40 PM

kenwood does not list the thiele small parameters for this woofer on there site.contact them at the link below. to design a proper band pass box we will need to know

Fs.

Qts.

Vas.

with these parameters i can help you with a simple 4th order band pass box

https://www.kenwood.com/cgi-bin/inter_contact.cgi?country_form=1&default_address=%3CB%3EKenwood+Corporation%3C%2FB%3E+%3CBR%3E2967-3%2C+Ishikawa-machi%2C+Hachioji%2C+Tokyo+%3CBR%3E192-8525%2C+Japan+%3CBR%3ETEL%3A+81%28426%2946-5111%3CBR%3EFAX%3A+81%28426%2946-7960%3CBR%3E&default_email=info@kenwood.com&mailto_others=info@kenwood.com&country=South+Africa&x=17&y=12

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bring back the rotary phone so i dont have to press 1 to proceed in english

Posted By: gezzy
Date Posted: August 10, 2006 at 3:46 AM

hi, kenwood emailed me with the following specs for a bandpass box...

Bandpass enclosure for KFC - W3003 subwoofer,
rear chamber 2.64cu ft,
front chamber 2.0cu ft.
Port diameter of 4 inches, lenght of 6.2 inches
QTC=n/a, F3 is 27/70Hz, do not use fill/dampening.

can someone help me with the actual dimensions so i can start cutting wood :)

thanks

Posted By: josh1979
Date Posted: August 10, 2006 at 8:49 AM

what are you putting this box in to ( car -suv - hatch back ) becaust it is going to be huge the simpleist build would make the box 56.75 / 12.75 / 12.75 that will give you a total of 4.66 cu.ft

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bring back the rotary phone so i dont have to press 1 to proceed in english

Posted By: gezzy
Date Posted: August 10, 2006 at 4:26 PM

Hi josh, the box is going into a E36 BMW, space isnt a issue :)

Posted By: josh1979
Date Posted: August 10, 2006 at 4:55 PM

i need the over all diameter of you woofer and than i will design you cut sheet

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bring back the rotary phone so i dont have to press 1 to proceed in english