how do I calculate the sub box enclosure?

Tony.ca · 7th June 2003, 02:10 AM

Hi guys,

Wanted to know if anyone has heard of a Q POWER 280 watts 15" sub woofer driver. If You did ,do you have the specs for it,if not where can I get one? I don't know how many cu. ft. of box volume should I build a box for this sub.

Any comments?

Thanx,

Tony

Ron E · 7th June 2003, 02:47 PM

Consider that good speakers cost something close to the diameter squared (i.e. 6"-$36; 8"-$64; 12"-$144; 15"-$225) in US Dollars.

If you payed less than half that, you either got a really good deal or the speakers are junk.

If you want to know the parameters, measure them. All you need is a resistor and your soundcard-equipped computer, a voltmeter and a couple cords (you can use the cords from broken headphones if you have any - as long as the cord isn't what is broken).

Go to:
http://www.kbapps.com/audio/speakerd...arameters.html and follow the instructions. You can download a tone generator program from the internet - a good one is called nchtone - do a search for it.

The program takes the place of the generator and frequency counter, and the rest is easy.

the main page has other good stuff, too and is at: http://www.kbapps.com

If you don't want to do this, stick them in a sealed box of 2-4 cubic feet (60-120 liters) and live with what you get...

Jimmy154 · 7th June 2003, 11:12 PM

Q POWER 280 watts 15 -- This sound like a (crappy) car subwoofer, is it? Go to caraudioforum.com Mostly a bunch of Fast and the Furious wanna be buttheads if you ask me, but they might know what it is.

What's the name of the company that makes the sub? Look at the sub harder try to find the name or some clues.

JOE DIRT® · 7th June 2003, 11:43 PM

your pretty safe with any 15 inch car audio sub with a 2.5-3 cu. ft box.....I have my Fosgate pwr12 in a 2 cu. ft ported box and it sounds decent

pinkmouse · 8th June 2003, 12:01 AM

Quote:

Originally posted by JOE DIRT®
your pretty safe with any 15 inch car audio sub with a 2.5-3 litre box.....I have my Fosgate pwr12 in a 2litre ported box and it sounds decent

You have managed to bend the laws of space time! Congratulations

A 15" driver in a box 10cm by 10cm by 30 cm? So how long have you been a Timelord?

JOE DIRT® · 8th June 2003, 12:05 AM

LMAO...I meant cu. ft....thanks for correcting me on that..hahahaha

7th June 2003, 02:10 AM	#1
Tony.ca diyAudio Member Join Date: Feb 2003 Location: Brantford- Ontario	how do I calculate the sub box enclosure? Hi guys, Wanted to know if anyone has heard of a Q POWER 280 watts 15" sub woofer driver. If You did ,do you have the specs for it,if not where can I get one? I don't know how many cu. ft. of box volume should I build a box for this sub. Any comments? Thanx, Tony

7th June 2003, 02:47 PM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Consider that good speakers cost something close to the diameter squared (i.e. 6"-$36; 8"-$64; 12"-$144; 15"-$225) in US Dollars. If you payed less than half that, you either got a really good deal or the speakers are junk. If you want to know the parameters, measure them. All you need is a resistor and your soundcard-equipped computer, a voltmeter and a couple cords (you can use the cords from broken headphones if you have any - as long as the cord isn't what is broken). Go to: http://www.kbapps.com/audio/speakerd...arameters.html and follow the instructions. You can download a tone generator program from the internet - a good one is called nchtone - do a search for it. The program takes the place of the generator and frequency counter, and the rest is easy. the main page has other good stuff, too and is at: http://www.kbapps.com If you don't want to do this, stick them in a sealed box of 2-4 cubic feet (60-120 liters) and live with what you get... __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

7th June 2003, 11:12 PM	#3
Jimmy154 diyAudio Member Join Date: Jun 2002 Location: Los Angeles	Re: how do I calculate the sub box enclosure? Q POWER 280 watts 15 -- This sound like a (crappy) car subwoofer, is it? Go to caraudioforum.com Mostly a bunch of Fast and the Furious wanna be buttheads if you ask me, but they might know what it is. What's the name of the company that makes the sub? Look at the sub harder try to find the name or some clues.

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7th June 2003, 11:43 PM	#4
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	your pretty safe with any 15 inch car audio sub with a 2.5-3 cu. ft box.....I have my Fosgate pwr12 in a 2 cu. ft ported box and it sounds decent

8th June 2003, 12:05 AM	#6
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	LMAO...I meant cu. ft....thanks for correcting me on that..hahahaha

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