Sub Enclosure

Guss · 24th June 2003, 09:51 PM

Ive got problems, i bought i 12 subwoofer and tried to compute a box for it. it gave me an approx 3358.34 liter box

( ± 120 cubic feet) . Would anybody refer me to a good ported box calculator or calculate it for me.

VAS 163.5 L
Fs 34 Hz
Qts 1.18
D aprox 12.8

phreeky82 · 25th June 2003, 12:34 AM

maybe it's made for free air use

i am not serious, but as far as i know it could be true

what sort of sub is it?

Guss · 25th June 2003, 12:57 AM

Dual voice coil 12 inch polypropylene cone. I used them as replacement drivers in big floorstanding cabs I made last summer and they work well, sound deep and detailed... It remains cheap radioshack drivers but I dont want to waste two 12 inch subs.

Kanga · 25th June 2003, 02:26 AM

Your Qts looks really high, which is why you are getting such large volumes. Qts is normally less than 0.5, or less than 0.8 for a car driver.

Better check that its right.

What kind of enclosure are you modelling?

Mick

Guss · 25th June 2003, 02:11 PM

In a bass reflex active system. For home.

Here's what is written in the tsp. sheet:
QES 3.09 / 1.55
QMS 5.03
QTS 1.89 / 1.18

there is two values due to dual voice coil but I cant say wich is the one. Also Im gonna use both VC in parallel. I feel kinda lost.

24th June 2003, 09:51 PM	#1
Guss diyAudio Member Join Date: Jun 2003 Location: Montreal	Sub Enclosure Ive got problems, i bought i 12 subwoofer and tried to compute a box for it. it gave me an approx 3358.34 liter box ( ± 120 cubic feet) . Would anybody refer me to a good ported box calculator or calculate it for me. VAS 163.5 L Fs 34 Hz Qts 1.18 D aprox 12.8

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25th June 2003, 12:34 AM	#2
phreeky82 diyAudio Member Join Date: May 2003 Location: Townsville, Australia	maybe it's made for free air use i am not serious, but as far as i know it could be true what sort of sub is it?

25th June 2003, 12:57 AM	#3
Guss diyAudio Member Join Date: Jun 2003 Location: Montreal	Dual voice coil 12 inch polypropylene cone. I used them as replacement drivers in big floorstanding cabs I made last summer and they work well, sound deep and detailed... It remains cheap radioshack drivers but I dont want to waste two 12 inch subs.

25th June 2003, 02:26 AM	#4
Kanga diyAudio Member Join Date: Mar 2001 Location: Melbourne, Australia	Your Qts looks really high, which is why you are getting such large volumes. Qts is normally less than 0.5, or less than 0.8 for a car driver. Better check that its right. What kind of enclosure are you modelling? Mick

25th June 2003, 02:11 PM	#5
Guss diyAudio Member Join Date: Jun 2003 Location: Montreal	In a bass reflex active system. For home. Here's what is written in the tsp. sheet: QES 3.09 / 1.55 QMS 5.03 QTS 1.89 / 1.18 there is two values due to dual voice coil but I cant say wich is the one. Also Im gonna use both VC in parallel. I feel kinda lost.

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