I bought a set of these HA-FX67 "Air Cushion" IEM's cuz I wanted something less precious and more comfortable than the Super.fi 5 Pro's I used to have. And, as far as comfort goes the JVC's are a homerun. But the sound barely lives up to the $25 (shipped) I paid for them. Bass is too muddy and way too prominent. Sounds like listening to music through a thick blanket. And I notice there is a paper (?) filter with two tiny holes in the tube of each earpiece, which means that's more or less what it is happening. I'm wondering if removing the paper filters will improve things? Thought I'd ask here before plucking 'em out of there. And if I do, and the result is too harsh, what's a better replacement? I know there's a mod like this for the Marshmallows, but all I ever see is people mentioning it .. no description in detail. Thanks.