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Second Skin Audio

Which box to make (WiniSD Graphs)


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Yeah and I do realize that what the graph says is far from what my in car response will be typically to "the good" as I might consider it or basically the graph reads conservatively.

But I've never gotten that kind of dB output on a winisd graph without making my box tuned to something crazy.

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8 hours ago, Joe X said:

WinISD is not designed to plot frequency response in- car but in an outdoors environment.

Ohh... I had 31hz 3.5cuft box and it was slaming lows but there was no highs, then I cut the port and made it 35hz 4.0cuft and now it's too "peaky" for me and I lost some of good low range but subwoofer started to move less but giving more output.. So I was thinking why not to make box bigger and tune it higher  so I still get some high frequency and dont lose lows.. What do you think is 4.5cuft net enough with 34-35hz tuning? 

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Here is a couple of plots, starting with your current boxes projected (average sized) in-car response:

red: 3.5 @ 31 Hz

yellow: 4 @ 35 Hz

More or less represents what you are describing:

cmp.jpg

 

red: 3.5 @ 31 Hz

green: 4.5 @ 32 Hz

green is what I would think will work.

vs2.jpg

 

As you can see the green curve touches the red line in lows but has more output at higher frequency. so 4.3-4.5 net @ 32-33Hz would be worth testing.

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19 minutes ago, Joe X said:

Here is a couple of plots, starting with your current boxes projected (average sized) in-car response:

red: 3.5 @ 31 Hz

yellow: 4 @ Hz

More or less represents what you are describing:

cmp.jpg

 

red: 3.5 @ 31 Hz

green: 4.5 @ 32 Hz

green is what I would think will work.

vs2.jpg

 

As you can see the green curve touches the red line in lows but has more output at higher frequency. so 4.3-4.5 net @ 32-33Hz would be worth testing.

Which program do you using? My car resonance frequency is 56hz if that helps.. and what about 34hz tuning with 4.5 net?

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Checked your dimensions and more or less meet 4.6 @ 33 Hz if you consider driver displacement.

red: 3.5 @ 31 Hz

orange : 4.6 @ 33 Hz

cmp.jpg

 

It looks like peaky to me, if it  looks ok to you may give it a try, I would add a layer to the baffle as well.

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1 hour ago, Joe X said:

Checked your dimensions and more or less meet 4.6 @ 33 Hz if you consider driver displacement.

red: 3.5 @ 31 Hz

orange : 4.6 @ 33 Hz

cmp.jpg

 

It looks like peaky to me, if it  looks ok to you may give it a try, I would add a layer to the baffle as well.

I think it will be okay, it's right inbetween 31hz and 35hz.. on 31hz tune I definitly missed some higher notes.
And mostly all music I listen to doesn't touch anything below 30hz.. 

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