Here are the tips used with each headphone:
- UE900: Comply Foam (S)
- W4R: Stock Grey (S)
- PFE232: Stock Silicone (S)
- 3.Ai: Blue Silicone (S)
I got as good as a seal with the small silicones as I did with comply with the UE900 (my preference then goes towards the silicone over foam if they both provide the same seal). With the W4, I do have bullet tips, the Greys provide more bass and don't lose seal. The bullet tips lose seal with movement, otherwise, they retain their seal when sitting (I still lose depth with them though :(). I got a better seal with the silicone on the 232 over the Comply Foam (included). 3.Ai, the tips make a big difference. I chose the one that provided not only the best bass response, but also the best overall sound (blues worked the best for me). Please note that I test all seals against the Sensaphonics Seal Test.
Really, there were only two IEMs where the tips made big changes in the bass (for me anyway), the W4 and the 3.Ai.
If anyone does want me to, I can swap the tips on my W4 and do a comparison when I have time again. Bass response (and depth) goes down though, but midrange is improved.
Edited by tinyman392 - 9/9/12 at 10:22pm