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Old 31st January 2011, 11:45 PM   #1
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Default 18" horn enclosure

Whats the best driver for this design?Can someone who knows how to use hornresp say how will this work?
Presentation1.zip
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Old 5th April 2011, 02:08 PM   #2
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I want to try my hand at horn resp. Still struggling with the rear enclosure volume and also, where exactly does S1 begin?
For selenium 18sw2p.
Untitled.jpg
I can post dimensions if anyone is willing to assist.
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Old 5th April 2011, 02:22 PM   #3
epa is offline epa  Netherlands
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s1 = s2 upper right corner.
and ad vtc and atc(font chamber.)
its a short hybrid th like the cubo but bigger
do you have a pdf drawing?

you should moddel it like i did here

Last edited by epa; 5th April 2011 at 02:40 PM.
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Old 5th April 2011, 02:46 PM   #4
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Quote:
Originally Posted by epa View Post
s1 = s2 upper right corner.
and ad vtc and atc(font chamber.)
its a short hybrid th like the cubo but bigger
do you have a pdf drawing?

you should moddel it like i did here
Thanks ,was planning to have it rear loaded ,I'll try it .
I have a pdf ,used google sketchup.Untitled.pdf

Last edited by simpleacoustic; 5th April 2011 at 03:06 PM.
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Old 5th April 2011, 05:07 PM   #5
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It kinda reminds me of Cubo Sub though it's bigger. You might want to have a look at it for the bracing details. Personally I would loose the corner reflectors, unless they're used as bracing-type, then I would change the size.

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Old 5th April 2011, 08:25 PM   #6
epa is offline epa  Netherlands
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Quote:
Originally Posted by simpleacoustic View Post
Thanks ,was planning to have it rear loaded ,I'll try it .
I have a pdf ,used google sketchup.Attachment 217138
could you provide some ts parameters on the woofer?
can't seem to find any.
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Old 5th April 2011, 09:34 PM   #7
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Selenium 18sw2p
THIELE-SMALL PARAMETERS
Fs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Hz
Vas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 (6.32) l (ft3)
Qts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.42
Qes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.43
Qms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.12
ho (half space) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.56 %
Sd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1194 (185.07) m2 (in2)
Vd (Sd x Xmax) . . . . . . . . . . . . . . . . . . . . . . . . . . . 776.1 (47.36) cm3 (in3)
Xmax (max. excursion (peak) with 10% distortion) . . . 6.5 (0.26) mm (in)
Xlim (max.excursion (peak) before physical damage)21.0 (0.83) mm (in)
Atmospheric conditions at TS parameter measurements:
Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 (75) C (F)
Atmospheric pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,022 mb
Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 %
Thiele-Small parameters are measured after a 2-hour power test using half AES power .
A variation of 15% is allowed.
ADDITIONAL PARAMETERS
bL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.4 Tm
Flux density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.75 T
Voice coil diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 (4) mm (in)
Voice coil winding length . . . . . . . . . . . . . . . . . . . . 50.5 (165.7) m (ft)
Wire temperature coefficient of resistance (a25). . . . . 0.00380 1/C
Maximum voice coil operating temperature. . . . . . . . 275 (527) C (F)
qvc (max.voice coil operating temp./max.power) . . 0.46 (0.88) C/W(F/W)
Hvc (voice coil winding depth) . . . . . . . . . . . . . . . . . 22.0 (0.87) mm (in)
Hag (air gap height). . . . . . . . . . . . . . . . . . . . . . . . . . . 9.0 (0.35) mm (in)
Re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6 W
Mms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217.7 (0.480) g (lb)
Cms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89.8 mm/N
Rms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 kg/s
NON-LINEAR PARAMETERS
Le @ Fs (voice coil inductance @ Fs). . . . . . . . . . . . . . . 11.069 mH
Le @ 1 kHz (voice coil inductance @ 1 kHz) . . . . . . . . . . 4.256 mH
Le @ 20 kHz (voice coil inductance @ 20 kHz) . . . . . . . . 1.797 mH
Red @ Fs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 .43 W
Red @ 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.75 W
Red @ 20 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230.22 W
Krm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.985 W
Kxm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.746 mH
Erm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.993
Exm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.712
Power handling specifications refer to normal speech and/or music program material,
reproduced by an amplifier producing no more than 5% distortion. Power is calculated as
true RMS voltage squared divided by the nominal impedance of the loudspeaker.
ADDITIONAL INFORMATION
Magnet material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barium ferrite
Magnet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,440 (120) g (oz)
Magnet diameter x depth. . . . . . . . . . . . . . 220 x 24 (8.66 x 0.95) mm (in)
Magnetic assembly weight . . . . . . . . . . . . . . . . . . . 8,600 (18.96) g (lb)
Frame material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum
Frame finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black epoxy
Magnetic assembly steel finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tin plated
Voice coil material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copper
Voice coil former material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fiberglass
Cone material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Non pressed long fiber pulp
Volume displaced by woofer . . . . . . . . . . . . . . . . . . . . 8.6 (0.304) l (ft3)
Net weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10,500 (23.15) g (lb)
Gross weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,720 (25.84) g (lb)
Carton dimensions (W x D x H). . . . . . 48 x 48 x 24 (18.9 x 18.9 x 9.5) cm (in)
MOUNTING INFORMATION
Number of bolt-holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Bolt-hole diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 .0 (0.32) mm (in)
Bolt-circle diameter. . . . . . . . . . . . . . . . . . . . . . . . . . . 438 (17.24) mm (in)
Baffle cutout diameter (front mount) . . . . . . . . . . . . . 422 (16.61) mm (in)
Baffle cutout diameter (rear mount). . . . . . . . . . . . . . 412 (16.22) mm (in)
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silver-plated push terminals
Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . Positive voltage applied to the positive
terminal (red) gives forward cone motion
Minimum clearance between the back of the magnetic assembly and the
enclosure wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 (3) mm (in)
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Old 6th April 2011, 02:10 PM   #8
epa is offline epa  Netherlands
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i did a qiuck ruff sketchup,and came up with this.
not to bad at all
the grey is 1 sub ,black is 4
Click the image to open in full size.
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Old 6th April 2011, 02:30 PM   #9
epa is offline epa  Netherlands
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Click the image to open in full size.
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Old 6th April 2011, 04:20 PM   #10
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Thanks ,I think I get the drift now.I must try it myself now.How will it compare with the cubo 18?
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