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Building today, check box plans.

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Expand view Topic review: Building today, check box plans.

by spkrman » Sat Mar 05, 2005 12:44 am

ridr4lif wrote:a 3.3 cu.ft. box per 12" comp vr sounds a bit big to me...considering kicker recommends 1.75-2.25 w/ a vent tuning around 38-40hz. Altho if you listen to a lot of music w/ deeper bass i could run a lower vent tuning, i have my box tuned to 38 (kickers spec) and i wish i tuned it lower.

TEDD

edit: visit kickers website and download the tech manual for the comp vr. lots of info and it gives u box designs.
2.5 cubes, 35hz... approx 25-30 sq inches of port... SWEET box :)

by ridr4lif » Fri Mar 04, 2005 10:56 pm

a 3.3 cu.ft. box per 12" comp vr sounds a bit big to me...considering kicker recommends 1.75-2.25 w/ a vent tuning around 38-40hz. Altho if you listen to a lot of music w/ deeper bass i could run a lower vent tuning, i have my box tuned to 38 (kickers spec) and i wish i tuned it lower.

TEDD

edit: visit kickers website and download the tech manual for the comp vr. lots of info and it gives u box designs.

by MobileAudio219 » Fri Mar 04, 2005 10:49 pm

Yes, there will be two boxes, one per sub. 4" port per sub should be plenty, right?

by ridr4lif » Fri Mar 04, 2005 10:42 pm

Actually, after u take into account wood thickness (i assumed .75") it would be 1.65 cu.ft. per sub. before divider and bracing.

TEDD

by kevinberry1 » Fri Mar 04, 2005 10:38 pm

Those demensions come out to be about 4.2 cubic feet total, so I hope you that is for both subs :bigwink:

Including a baffle and accounting for the thickness of the MDF (or whatever you are using) it should be around 2 cubic feet per sub. I would have to put it all into winISD to get the exact specs, but that seems about right for your subs (i have the same pair of 2004's).

Let me know how it sounds and I may try these demensions myself soon.

by spkrman » Fri Mar 04, 2005 3:49 pm

you need more port area

Those dims were PER sub?

by MobileAudio219 » Fri Mar 04, 2005 10:22 am

Yeah I checked the port lenght with a few different programs, so I'm pretty sure its right... I'm going to use a ssf just to be safe... Also, I got all the pieces cut yesterday and went to screw it together and couldnt find my screws, so its still not done... Oh well, I'll finish it over the weekend..

by 71buickfreak » Thu Mar 03, 2005 5:08 pm

yes, use the subsonic. Set it at 20hz. thats high enough. that port sounds a little short. have you checked it with a calc?

re

by MobileAudio219 » Thu Mar 03, 2005 11:44 am

Ok... I started building around 1pm. Around 40 mins into it I am about half done... I'm taking my time and checking things over a bit, plus a made a last few last min adjustments... I'll try getting a few pics of the finish product (other then it being painted) tonight.... :thumbsup




Wish me luck
justin

by William from NOLA » Thu Mar 03, 2005 10:23 am

Have you found the excursion curve for the driver? That will tell you.

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