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Building today, check box plans.
Posted: Tue Mar 01, 2005 10:11 am
by MobileAudio219
My cousin and I went to Lowes yesterday and bought everything we will need, today we are going to build it... Each box will house a single 12" kicker comp vr. Here are the plans if anybody wants to check them and see if they look alright.
18"h - 24"w - 17"d
Port will be 4" schedule 40 and will be 5.6" long
It should be tuned to right around 35(ish)hz right?
Also, since the the jbl 600.1 doesnt have a ssf I can use this right?
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 5752589705
I would set that at 30 or 35 then set the low pass on the amp to around 80ish?
Thanks, Justin
Posted: Tue Mar 01, 2005 11:46 am
by ridr4lif
Posted: Tue Mar 01, 2005 12:51 pm
by William from NOLA
80 is a good spot usually. Make sure your mains are set for high pass at 80 as well (if you can that is). You won't need a sub sonic filter that high, I'd put your box into something like winISD and see how the driver will exurt at lower frequencies, if it does not go to it's full extention at 20 hz, you probably won't even need a ssf. I wouldn't really put a ssf higher than 27 Hz.
re
Posted: Tue Mar 01, 2005 2:52 pm
by MobileAudio219
So you think it would be ok NOT to use a ssf? The box is going to be tuned to 35hz, and each sub will get around 300 watts each from a jbl 600.1.
It plays every type of music, including some low punchy rap/hip hop.
I can get the ssf if you there is a risk of hurting the subs/amp, but if you dont think its necessary then I won't even bother ordering one.
re
Posted: Thu Mar 03, 2005 2:13 am
by MobileAudio219
Anybody.... Should I get a SSF or not?
Posted: Thu Mar 03, 2005 10:23 am
by William from NOLA
Have you found the excursion curve for the driver? That will tell you.
re
Posted: Thu Mar 03, 2005 11:44 am
by MobileAudio219
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....
Wish me luck
justin
Posted: Thu Mar 03, 2005 5:08 pm
by 71buickfreak
yes, use the subsonic. Set it at 20hz. thats high enough. that port sounds a little short. have you checked it with a calc?
Posted: Fri Mar 04, 2005 10:22 am
by MobileAudio219
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..
Posted: Fri Mar 04, 2005 3:49 pm
by spkrman
you need more port area
Those dims were PER sub?