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Behind the VPR unicorn Saturation Plugins
Old 1 week ago
  #1
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lectric's Avatar
 

Thread Starter
Behind the VPR unicorn

After studying for weeks all the information available on the web about VPR bass traps, I decided to pursue my first VPR unicorn. The information available is diffuse, which is obvious since VPR is a patent.
Definitely in my small room traps of 1.5 x 1 m would be difficult to place and it is possible that I would reflect the treble to the mix position.
I bet for traps of 1.2 x 0.62 m that will be easier to fit in my room and to which I could add a mid-treble absorber if they reflect me too much.
For this first unicorn hunt I want to use 1mm cold pressed steel or galvanized steel.
My fear is that if I do not cover them, the metal will reflect too much light and my room will look like a hall of mirrors.
What do you think of allowing a little oxidation of the steel and then apply a varnish for stop the corrosion??? It could look like a modern sculpture¡¡
(BARNIZ PARA METAL - Leroy Merlin)
Could the varnish change the response of 1mm steel to low frequencies?
What do you think?

Thank you for your answers¡¡
Old 1 week ago
  #2
Gear Maniac
 
ReDRuMx's Avatar
As you noticed correctly, you are building a unicorn, so I wouldn't focus to much brain power on worrying about it being to reflective to light. Make sure you get a fully-functional unicorn first - you can always place a thin layer of whatever in front of it to block light.

But I doubt a thin layer of varnish would affect the LF response at all. With that said, it is an "unknown", so who knows. Try it
Old 1 week ago
  #3
Gear Guru
 
DanDan's Avatar
Size Matters

I wouldn't risk building a smaller design. I would assume that the commercial designs and the original inventors made the best choice.
It has been hard to get hold of Isobond, but Don has fixed that CARUSO-ISO-BOND 100mm WLG035 Absorber panel 1560mm x 1090mm, 112,95 &

I nearly went ahead with some of this, may do sometime. Regarding steel I intended getting it professional painted or powder coated. I would imagine galvanised would be a practical cheap option also. Note there are variations with 75mm Fibre, 1mm Steel, 25mm fibre.


DD
Old 1 week ago
  #4
Gear Head
 

What's a vpr unicorn? Is it different to modex plates?
Old 1 week ago
  #5
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lectric's Avatar
 

Thread Starter
Thank you all for your time.
It will be better to respect the original measurements. I do not want such big traps to reflect mids and treble to my mix position. So the problem with the cib is that there is no simple solution to cover with a 30mm plate of the same material the steel.
In any case, I imagine that if it can be painted, it can be varnished and that a bit of oxide will not change the acoustic properties of steel.
Old 1 week ago
  #6
Gear Maniac
 
ReDRuMx's Avatar
Quote:
Originally Posted by lectric View Post
So the problem with the cib is that there is no simple solution to cover with a 30mm plate of the same material the steel.
Maybe I'm misunderstanding something, so maybe what I'm asking makes no sense... But, when you build the VPR - if you get unwanted HF reflections - why don't you just add some relatively thin porous absorber in front of the VPR? Not touching, of course. This will most definitely not influence low-end absorption characteristics of the VPR. If you want to keep the plate exposed for aesthetic effect, then I understand
Old 1 week ago
  #7
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Thread Starter
Quote:
Originally Posted by ReDRuMx View Post
why don't you just add some relatively thin porous absorber in front of the VPR?
Which suggests for 1.5 x 1 meter???
Old 1 week ago
  #8
Gear Guru
 
DanDan's Avatar
BCA

Quote:
But, when you build the VPR - if you get unwanted HF reflections - why don't you just add some relatively thin porous absorber in front of the VPR? Not touching, of course.
There are varied VPR designs with a bunch of odd acronyms. CBA BCA.
Compact Broadband absorber. The Modex Plate Broadband is also like this. The clue is in the Model number 30/1/70. As I said earlier, a sandwich of 70mm CIB, 1mm Steel, 30mm CIB.

Quote:
Which suggests for 1.5 X 1 meter???
No entiendo, que dices?

DD
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