15" kicker l7 30hz box design help !! - Page 2 - diyAudio
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Old 13th November 2011, 11:19 PM   #11
NEO Dan is offline NEO Dan  United States
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NICE RIDE! Glad you like the box. The sim looked pretty good for something so easy to build.
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Old 14th November 2011, 10:53 PM   #12
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Quote:
Originally Posted by justint View Post
SATISFIED!! box is done. I have lights going out from them being rattled, parts of my house shaking i have never seen before. This box is amazing finally satisfied 1 15" kicker and 2 3015lf's all in a stealth setup behind the tv.. Thanks everyone..
Glad it finally worked out! I've found that upgrading to longer screws (3") in the door hinges around my house has helped keep the doors attached to the frames.

later,
rev.

edit: oh yea, also some thin silicone feet at the top/bottom corners of the door frame keeps the door from slapping against the frame when closed. They should really make solid doors less flexible

Last edited by revboden; 14th November 2011 at 10:59 PM.
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Old 14th November 2011, 11:30 PM   #13
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Just for fun: with a big open room if you have some string and blue tack, stick a string to the ceiling in the middle of the room. Then put a mark on the string that corresponds to something sitting on the floor next to it, a kitchen chair back works well. When you hit a resonante frequency it'll show you how much deflection you are getting.
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Old 15th November 2011, 05:36 AM   #14
NEO Dan is offline NEO Dan  United States
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Originally Posted by justint View Post
I will try and run sum #'s and tests tommorow.. I have to support my Green Bay Packers tomm.. Also Neo is it possible to check if I switch to the dual 4 ohm L7 15" if anything changes on my #'s that way I can have the QSC feed it 1200 watts .. Thanks for all the help!!
I've crunched some numbers and in the interest of long term durability I changed my mind, I don't think I'd bridge the amp on the D2 there's just too much potential to kill it. If that amp is what the EP2500 is copied from the voltage is ~125v across the top rails, and since the ~40Hz excursion peak coincides with the ~40ohm impedance peak you could potentially get full voltage without it sagging. Good call on the D4, I think if you wanted to wire it up with the coils in parallel and run on one channel it'll work out perfect. As far as the difference in response between the two using the published parameters is almost nothing at equal power the traces are almost entirely overlapping.
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Old 15th November 2011, 04:09 PM   #15
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Umm doesn't the Lamborghini owner get mad if you get saw dust all over the car?? Or is that yours?

Ohh nice box too lol
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Old 15th November 2011, 09:01 PM   #16
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Since he has a 30Hz HPF in the amp I gave it a little bump
Are these the correct parameters? I have the Kicker 08S15L74. I used

S1 = 20.5" x 8.75"
S2 = 20.5" x 8 9/16"
S3 = 20.5" x 8 7/32"
S4 = 20.5" x 8 1/32"
S5 = 20.5" x 7.5"

Length = 8" + 46" + 46" + 8" = 108"

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Old 15th November 2011, 10:36 PM   #17
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Originally Posted by justint View Post
......a box for that can do 120+ db's @ 30hz..
Well, I ran the numbers on a DTS concept the other day, but just now getting around to posting it and see it's too big, too late. Oh well, at least it doesn't need a high pass.......

GM
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File Type: gif Kicker L7 ~11.5 Hz DTS concept specs.gif (14.4 KB, 210 views)
File Type: gif Kicker L7 ~11.5 Hz DTS concept.gif (22.5 KB, 210 views)
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Old 15th November 2011, 10:52 PM   #18
NEO Dan is offline NEO Dan  United States
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at least it doesn't need a high pass.......
Famous last words right there
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Old 15th November 2011, 10:56 PM   #19
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Not in any home HIFI/HT app I want to experience.

GM
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Old 15th November 2011, 11:13 PM   #20
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Looks like anything ~10Hz and again ~18Hz is likely to spank the woofer pretty hard. ~200w makes x-max but not much output @112dB 2Pi.
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Last edited by NEO Dan; 15th November 2011 at 11:38 PM.
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