Yes the filters are attached to the core which I didn't know before buying them. To be honest IMO, the 100s de-cored are so small and soft that they basically do not affect the sound because the nozzle of the earphone almost reaches the end of the tip. I don't have any olives as they are too large and hard to be comfortable. Sony hybrids also fit on the 900s and definitely help out with the bass especially the larger (blue?) sizes.
1/11/14 at 7:03pm