I honestly thought the mods made the sound smoother overall. I think the back foam was causing some over damping issues that made the sound more strained than it should have been. Treble might be the smallest hair brighter, but overall easier to listen to. Removing that plastic spider that holds the back foam in place helps further, as will damping. You can also try the drawer liner addition I suggested earlier if you want a bit more smoothness. Air does improve with mods.