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Old 12th February 2011, 10:32 PM   #11
Thawach is offline Thawach  Thailand
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simpleacoustic see this thread i posted it on thai forum last week. it may help u to design.

need Manifold 2 x 18 cabinet plans

haha/
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Old 13th February 2011, 12:19 AM   #12
djk is offline djk
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http://www.parts-express.com/pdf/264-385.pdf

Driver Properties
Name: 18SW2P
Type: Standard one-way driver
Company: Selenium Loudspeakers
Comment: Professional series
No. of Drivers = 2
Mounting = Standard
Wiring = Parallel
Fs = 36 Hz
Qms = 16.12
Vas = 6.32 cu.ft
Cms = 0.0884 mm/N
Mms = 221.1 g
Rms = 3.103 kg/s
Xmax = 6.5 mm
Xmech = 9.75 mm
P-Dia = 389.9 mm
Sd = 1194 sq.cm
P-Vd = 0.776 liters
Qes = 0.43
Re = 5.6 ohms
Le = 2 mH
Z = 8 ohms
BL = 25.52 Tm
Pe = 600 watts
Qts = 0.419
no = 1.872 %
1-W SPL = 94.87 dB
2.83-V SPL = 96.42 dB
-----------------------------------------
Box Properties
Name:
Type: Vented Box w/ Active HP Filter
Shape: Prism, square (optimum)
Vb = 8 cu.ft
Fb = 40 Hz
QL = 5.944
F3 = 41.93 Hz
Fill = minimal
No. of Vents = 2
Vent shape = rectangle
Vent ends = one flush
Hv = 10.67 in
Wv = 3 in
Lv = 8.487 in
-----------------------------------------
Active 12 dB/oct. HP Filter
Fx = 40 Hz
Qx = 1

Note the vent size, and the 40hz filter.
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Last edited by djk; 13th February 2011 at 12:23 AM.
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Old 13th February 2011, 05:08 AM   #13
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Thanks,but I need translation,haha ,I've seen the ev manifold but wanted a different look.I need to know if a box looking just like this can be tuned by port or size to perform just as good but with the same SHAPE.Hope I don't sound silly.
I guess I'm too lazy and busy to do the math.
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Old 13th February 2011, 05:18 AM   #14
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The EAW sb1000 goes too low for me,I will need at least a 4 stack to go as loud as my two bass reflex 2 18" enclosures that I have now with the same selenium drivers.Never tried the manifolds but as I said...A different look!
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Old 13th February 2011, 06:09 AM   #15
freddi is offline freddi  United States
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for a groovy look and cone control one might try the 5181 K-coupler
http://img72.imageshack.us/img72/825/gaussbracing.jpg

diy version with 18" JBL
Click the image to open in full size.

Last edited by freddi; 13th February 2011 at 06:13 AM.
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Old 13th February 2011, 05:47 PM   #16
NEO Dan is offline NEO Dan  United States
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Click the image to open in full size.
Code:
ID=28.00
Ang=2.0 x Pi
Eg=2.83
Rg=0.01
Fta=13.66
S1=0.01
S2=1560.08
Par=35.56
F12=0.00
S2=1560.08
S3=2590.32
Par=23.50
F23=0.00
S3=0.00
S4=0.00
L34=0.00
F34=0.00
S4=0.00
S5=0.00
L45=0.00
F45=0.00
Sd=1194.00
Bl=25.56
Cms=8.81E-05
Rms=3.11
Mmd=198.15
Le=4.26
Re=5.60
OD=2S
Vrc=231.00
Lrc=20.00
Ap=696.77
Lpt=17.78
Vtc=0.00
Atc=0.00
Pmax=100
Xmax=5.0
Comment=18SW2P Ctrl+O=23.5
Attached Files
File Type: zip 18SW2P.zip (78.5 KB, 60 views)
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Last edited by NEO Dan; 13th February 2011 at 06:12 PM. Reason: Added Sketchup file, change .zip to .skp
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Old 13th February 2011, 06:41 PM   #17
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Wow!!!Thank you soo much,this looks great!Just what I'm lookin for .If today was'nt Sunday I'd be rushing to the hardware store to order the plywood for this .I"ll post the pics soon as I'm finished .
THANKS AGAIN!
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Old 13th February 2011, 06:41 PM   #18
djk is offline djk
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That zip file is damaged.

Anyway, it's only a horn above 100hz, probably has a nice peak between 150hz~200hz.

"Thanks,but I need translation,haha"

You didn't give a port dimension in your first post. I figured it out for you, 10-5/8" tall, 3" wide, by 8-1/2" deep.

Use a 40hz high-pass filter, with a Q=1 if adjustable.
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Old 13th February 2011, 06:51 PM   #19
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Thanks very much for that also ,was'nt too sure myself ,Is this much higher than the eaw 850 ?Just to compare with something I've heard..

What software did NEO Dan use to draw this?
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Old 13th February 2011, 06:51 PM   #20
NEO Dan is offline NEO Dan  United States
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it's not a zip
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