Yeah, I wound up using Brown Bread all the way around, in addition to a layer of VComp in the rear and HLiner under the hood. The difference is incredible. The coolest thing is I can crank it way up inside and you can barely hear it outside until you open a door. You can still hear the highs a bit if it's really blaring, but there is zero vibration to spread those lows anywhere except where they're supposed to be.