backreading helps, bro
the 1r gives heavier bass impact
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i tried dynamat before i send my 1r back for RMA, although even the bass got more controlled, it is still too much for my tastes. and dynamat is almost irreversible because it is too messy to remove it. i think an open-cell foam is a better alternative although it didnt made any difference when i used that material haha..
putting some cotton material helps in reducing that resonance in the bass since they share similar sound with the esw9 with also has that resonance in that region. too much cotton material will make it sibilant though