Super Bass by perfektern seat

Hello There,
I use this plug with a Sennheiser IE7.
I was not quite happy with the enclosed plugs: none fit so quite and lacked much of bass. When I pressed more firmly the earphones hand ear, or even the ear with hand've covered, the bass was much stronger: so it must be due to the plugs.

Then I got this (size L fits me best) tried: SUPER!
Now I hear even a bottomless bass, which is probably achieved by the those things the ear very well to the outside shield (ambient noise are greatly attenuated), because they are relatively soft and therefore adapt perfectly to your ear.
Also the feeling in the ear is more pleasant for me than the Sennheiser silicone / Plastickstöpsel. I recommend rather a number to take greater because the shield is at its best.

Only the attachment to the earphones is very difficult (though I'm in a little foam demolished), at least with my Sennheiser IE7, might be a bit too thick. I then used some Vaseline When inserting, then you go without problems.
The plugs have a smooth "inside passage", in contrast to the Sennheiser where the plugs virtually lock (handset has a groove), but keep perfect.