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View Full Version : Enclosure design for 16 8's



Rawr-DQ
05-02-2008, 10:38 AM
Looking at a clamshell design.
http://img180.imageshack.us/img180/6238/clam1ot1.jpg

Considering doing it for my own.

However. The mouth, I can only get about 8x33.5....=268"s Surface area.
The speakers have a surface area of 804"s......16 8"s.

Any idea on how well it will work?

ContourSPL
05-02-2008, 10:50 AM
What kind of 8's are they? I say bandpass if you're going to wall it.

Rawr-DQ
05-02-2008, 10:51 AM
The final specs will look like this:

Re = 3.37 ohms (4 ohm nominal)
Fs = 34.9 hz
Qes = 0.5323
Qms = 6.93
Qts = 0.4943
Vas = 7.6 L
BL = 13.3 N/A
Mms = 127.7 grams
Cms = 162 um/N
Xmax = 12mm one-way linear (70% BL method)
Rated RMS Power = 200 watts
Depth = 4.25"
OD w/ gasket = 8 5/16"
Cut Out = 7"


Sealed Box:
0.280 ft^3 w/ F3 of 50 Hz (Qtc = 0.707)

Ported Box:
0.60 ft^3 tuned to 30 Hz
F3 of 25 Hz

Rawr-DQ
05-02-2008, 10:53 AM
Oh by the way, this is a trunk car, I will be attempting an IB, with the clamshell front.

going with clamshell because of space, I just don't have it.

MikeyB
05-02-2008, 10:57 AM
What are the rules and things to look out for in a clamshell? Do you need the opening/mouth to be as much surface area as the cones or what?

Rawr-DQ
05-02-2008, 10:59 AM
that's what I'm not sure about.

I was told it'd at like a bandpass, and I had enough surface area that each 8" would have something like a 4x4" port.

Rawr-DQ
05-02-2008, 12:10 PM
subs purchased.

stuckinok
05-02-2008, 12:14 PM
sundown 8s huh?

MikeyB
05-02-2008, 01:30 PM
Someone that knows something about this please chime in! I am curious to know some things about clam-shells since it is more than likely going to be my next setup as well.

BTW how much power are you going to be running to the 8's?

Rawr-DQ
05-02-2008, 01:43 PM
I will be running 1 or two sundown 3000D's

soo... anywhere from...

I can wire them to 1 ohm, or .25 ohms. or 4 ohms

8000 watts/ 500 each @ 1 ohm strapped
3200 watts/ 200 each @ 4 ohm strapped

kill 1 amp @ .25 ohms and get maybe 5000? with 312.5 per speaker.
Run 1 amp @ 1 ohm, and get 3000 / 187.5 to each speaker.

Rated 200, has been run 400, and burped at possibly 800.

MikeyB
05-02-2008, 02:08 PM
Nice! :D