I've found a simple way of "improving" the sound On my ax-35.
Using the results obtained by Rin's mods I preferred more bass in my iem which is achieved by sealing off the front vent. However That increases it too much. By coincidence the silicone tips can wrap around the housing. It creates a more controlled bass and I seems to have better detailing on instruments, particularly cymbals.
1) Place stock silicone tip on backwards until they "click" in place (any size)
2) turn the tip inside out whilst on the iem
3) Ensure the ends wraps around the housing (except the small tips)
4) insert the stock foam tips over the existing silicone tips. The tube section of the tips will be exposed to allow the foam tips to slot in. Alternately trim the inner tube of the silicone tips to allow the iem to be nearer to the ear which sounds better IMO.
General: More bass, slight decrease in sibilance, soundstage still as wide but set further apart due to the increased distance from the actual iem.
Small tips: bass response mildly increased, sibilance reduced slightly.
Medium tips: slightly larger bass increase, same sibilance reduction. For me this hits a sweet spot which I enjoy
Large tips: again a little more, same sibilance reduction (although harder to perceive over the bass)
Complete removal of sibilance: take out the tubes attached to the ba driver. Of course you sacrifice a bit of treble in the process.
Edited by Ripsaw - 6/29/14 at 9:12am