Uh-oh...scary x-max results in WinISD

[bikinpunk 10+ year member]

Well, I've been tinkering with different ideas. I haven't really ever used winISD but seem to have gotten it figured out in the last couple hours.

When I clicked on the "cone excursion" drop down, I got this:

Now, I'm scarily assuming this is a true representation of what my subwoofer's excursion will be. Right? It is set to "peak" on options. It's only supposed to go to 29mm (as denoted by the red horizontal line). I get nearly the same results with JL's specs: 36hz, 1.75 cubes. //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Note: The white graph is ported plans, and yellow is sealed. The white one is the one I'm speaking about.

Click to read more...

 

[Lil Poot 5,000+ posts]

oh n0es!

 

[phyphoestilic 5,000+ posts]

well thats cuse it's below the box tuning.

 

[skadude016 5,000+ posts]

Ya i wouldnt go by that at all //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[phyphoestilic 5,000+ posts]

Ya i wouldnt go by that at all //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

why not? It seems right

 

[bikinpunk 10+ year member]

well thats cuse it's below the box tuning.

I was just about to post that I didn't realize which frequency that was at.

I'd be setting the subsonic filter at the tuning anyway.

Whew...I got skeeered. Haha. //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif

 

[phyphoestilic 5,000+ posts]

I was just about to post that I didn't realize which frequency that was at.
I'd be setting the subsonic filter at the tuning anyway.

Whew...I got skeeered. Haha. //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif

Ya, I think the program is assuming u'll be using the same amout of power all the way thro, and it wouldn't suprise me if it tried to extend to 50mm + at 17hz without a subsonic filter.

Looks right, peaked around 31-32hz.

 

[bikinpunk 10+ year member]

Alright.

Should I be getting such a low excursion @ the tuning frequency? Seems backwards from what I understood tuning to be.

Looks like I have some more reading to do...

 

[phyphoestilic 5,000+ posts]

Alright.
Should I be getting such a low excursion @ the tuning frequency? Seems backwards from what I understood tuning to be.

Looks like I have some more reading to do...

Ur gettin peak excursion at what ur tuned to. U sure ur reading the graph correctly? U have the box tuned to 32hz, ur subwoofer is gonna hit its 29mm peak excursion at 32hz. I dont see whats wrong with that.

Edit: Actually it doesnt look like it peaks till about 25hz.

 

[skadude016 5,000+ posts]

why not? It seems right

there is no way winisd can give the exact point at where it will start doing that because each car,van,suv,truck is different.

 

[skadude016 5,000+ posts]

Ur gettin peak excursion at what ur tuned to. U sure ur reading the graph correctly? U have the box tuned to 32hz, ur subwoofer is gonna hit its 29mm peak excursion at 32hz. I dont see whats wrong with that.

usually the woofer will only slightly move at or around box tuning //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[bikinpunk 10+ year member]

Ur gettin peak excursion at what ur tuned to. U sure ur reading the graph correctly? U have the box tuned to 32hz, ur subwoofer is gonna hit its 29mm peak excursion at 32hz. I dont see whats wrong with that.

Yea, I had just changed the tuning since the initial post. Sorry for the confusion.

What didn't make sense to me:

I thought the peak excursion would be the point at which the subwoofer hit the highest number, and 29mm would be the nominal excursion. Am I just thinking opposite of what I am seeing? In this case, the lowest point is at the tuning frequency, so that's the peak excursion?

 

[phyphoestilic 5,000+ posts]

usually the woofer will only slightly move at or around box tuning //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I edited it after i looked more closely //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[skadude016 5,000+ posts]

I edited it after i looked more closely //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

ya i didnt see that till after i posted mine //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[bikinpunk 10+ year member]

Okay, so then, for Signal Generator...is that a representation of what I would expect using the parameters I hear?