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Box volume change with No-Res?

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Bullitt5094

Box volume change with No-Res?
« on: 8 May 2020, 01:09 pm »
Should you increase the box volume to make up for the volume of the no-res you add to it?
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mlundy57

  • Industry Participant
  • Posts: 3626
Re: Box volume change with No-Res?
« Reply #1 on: 8 May 2020, 01:16 pm »
No. While the damping layer takes up a little of the internal volume, the foam slows down air movement which acts like a bigger box. So the gain from the foam offsets the loss from the damping layer. The result being NoRez is volume neutral so no change in box size is necessary.
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Bullitt5094

Re: Box volume change with No-Res?
« Reply #2 on: 8 May 2020, 02:03 pm »
Makes sense. Thanks!
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Captainhemo

Re: Box volume change with No-Res?
« Reply #3 on: 8 May 2020, 03:56 pm »
That is why  it is important for anyone    making their own  no-rez (heavy floor  tiles/OCF) it is important to use the  open cell foam

jay
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AverageNiceGuy

  • Jr. Member
  • Posts: 85
Re: Box volume change with No-Res?
« Reply #4 on: 8 May 2020, 05:30 pm »
Good info, Thanks.
I was wondering about that.
I will be installing No-Rez in some new CST-1's when it arrives.
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WC

Re: Box volume change with No-Res?
« Reply #5 on: 8 May 2020, 10:50 pm »
I was wondering about that. I was building a small MLTL unit and opted to not use No-rez on it since the thickness of the turn was only 1". Figured that it would screw up the design. Using 1/2" felt instead, which is what the designer recommends.

I am using the no-rez in my subs and in my woofer cabinet.
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