Rank these rockwool types please

[Hugo Huijer]

Hi,

Very soon I will be building DIY acoustic panels. Unfortunately, I am only able to chose out of the following rockwool types:

Rockwool 201 (density: 35 kg/m3)
Rockwool 433 (density: 45 kg/m3)
Rockwool 204 (density: 34 kg/m3)
Rockwool 504 density (140 kg/m3) !!

I am just asking for your opinions. Please rank them from best to worst!

Thank you!

 

[mixsit]

http://www.bobgolds.com/AbsorptionCoefficients.htm
Rigid fiberglass density tests
You'll see depth, wall spacing has more impact than density.
Your '201 and 204 same density, but diff depth maybe?
No idea where the 504 comes in (likely a fairly stout board.