Two sound absorption alternatives, should i go for it?

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MidoBan

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Hi guys, i'm getting some sound absorption materiel for my home studio (live room) and i plan on getting some glass or rock wool, like we all know are recommended. But in the store i'm going to, in addition to glass and rock wool, there are some two other materials that according to the the store's website are meant specifically for sound absorption. The meterials are: Basotec Melamine and Polyurethane.

Here are the acoustic specs of the Basotec Melamine: link
Here are the acoustic specs of the Polyurethane: link

Can you tell me from these specs if i should get one of these instead of what i planned?

Thanks
 
Those are all find and dandy for doing broadband absorbers, but not for bass traps. Those won't even touch the low end for that you need something more dense like the insulation. If those are cheaper you may want to get those just for your broad bands to save a couple bucks, but your going to need something as dense as the insulation for the bass traps.
 
Those are all find and dandy for doing broadband absorbers, but not for bass traps. Those won't even touch the low end for that you need something more dense like the insulation. If those are cheaper you may want to get those just for your broad bands to save a couple bucks, but your going to need something as dense as the insulation for the bass traps.

Money is not the issue here, they're both fairly cheap.. i can use only the denser (45-60kg/m^3) glass or rock wool for both if its just better.
 
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