How to calculate woofer displacement?

[Reggie Lives 10+ year member]

Is there any easy method / online calculator to determine the woofer displacement of a particular woofer?

My sub didn't come with any specs execpt for the thiele/small parameters. I've done a bunch of online searches but only came up with two methods. Once was to dunk the sub in a bucket of water and determine how many liters of water was displaced. The other was an elaborate formula based off of the distance between the surround and the bottom of the magnet.

I tried the later, and came up with a figure of .27ft^3. Is that not fairly large for a 10" sub? The sub in question is a CSS SDX10.

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[Supergumby5000 5,000+ posts]

look up a subwoofer thats built similar to yours, and look at its spec sheet for displacement?

.27 seems pretty big for a 10

 

[goonandbuck 10+ year member]

Is there any easy method / online calculator to determine the woofer displacement of a particular woofer?
My sub didn't come with any specs execpt for the thiele/small parameters. I've done a bunch of online searches but only came up with two methods. Once was to dunk the sub in a bucket of water and determine how many liters of water was displaced. The other was an elaborate formula based off of the distance between the surround and the bottom of the magnet.

I tried the later, and came up with a figure of .27ft^3. Is that not fairly large for a 10" sub? The sub in question is a CSS SDX10.

yea theres a real easy way........read the specs of the sub

edit: reading > me , i didnt read that you didnt have the specs

 

[Supergumby5000 5,000+ posts]

yea theres a real easy way........read the specs of the sub

did you even read his post lol?

 

[miker 5,000+ posts]

.027 would make more sense..

 

[IDSkoT 5,000+ posts]

Uhh... google ftw //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[Reggie Lives 10+ year member]

I'm checked google a few times, do you have a link to a site your referring to?

I checked JL's site, because they list the driver displacement of their subs. The mounting depth and magnet diameter of my sub fall roughly between the 10W3 (0.049cu.ft) and the 10W6 (0.068cu.ft). Would it be a safe bet to just use 0.05 as a arbitrary number?

Are there other factors involved in the driver displacment that I'm overlooking?

 

[goonandbuck 10+ year member]

did you even read his post lol?

did you read my edit?

 

[dman4486 5,000+ posts]

Once was to dunk the sub in a bucket of water and determine how many liters of water was displaced. The other was an elaborate formula based off of the distance between the surround and the bottom of the magnet.
I tried the later, and came up with a figure of .27ft^3. Is that not fairly large for a 10" sub? The sub in question is a CSS SDX10.

this is the best way

 

[Reggie Lives 10+ year member]

this is the best way

Is it a common method? I can see the logic in it, but i'm hesitant to put my new $170 (I'm poor) electronic toy in water, and I don't trust plastic bags/seran wrap.

 

[dman4486 5,000+ posts]

Is it a common method? I can see the logic in it, but i'm hesitant to put my new $170 (I'm poor) electronic toy in water, and I don't trust plastic bags/seran wrap.

LINK

 

[ultimate157 5,000+ posts]

I would email CSS for the number. The SDX10 is a pretty big moofer.

 

[Reggie Lives 10+ year member]

LINK

Haha, yeah, I thought you were being serious and felt I had to justify why I didn't want to do it. I've read a few places that it can be done, but yeah....I woudln't do that.

 

[patrick1202 10+ year member]

my fi ssd is .17 which is a 15

 

[Reggie Lives 10+ year member]

I would email CSS for the number. The SDX10 is a pretty big moofer.

I don't have an exact number but I'd say between 2 and 3 litres. It's really not that critical for this type of application. 16 oz stuffing is good.

 

Bob Reimer

Creative Sound Solutions

Just in case anyone was wondering.....so around .07 to .105 cu.ft.

Thanks for everyone's replies.