Okay I gotta a bigger room finally to record and mix in thanks to my understanding wife, My problem now is I need more bass traps I've already have some DYI using rigid fiberboard but with the bigger room I have to much bass on my mixes after A-Z testing

just wanted to know if I could use Rockwool insulation 4" 2'x4' slaps for bass traps cut in triangle on each corner wall then maybe more behind the monitors and maybe more on side walls and ceilings? But heard Rockwool only good to 100Hz and above

I already know about Ethan's link but no mention of Rockwool only rigid fiber board. Any opinions and info. greatly appreciated.
