Install for 2 years, positioned in the corners of the wall lcoute face, the CR3030 COLSOUND 1 pack per angle are very effective, and treats low mdium especially removes the effect of turning low in angles.
The listening quality is much cleaner and accuracy of all.
Very easy to install, and the price is really very comptitif 119 TTC
I strongly advice for all homes studio owners, and besides some prod s'quipe now with this solution.
For acoustic correction there are other products COLSOUND SEE SITE WITHOUT FAULT