How do you get them on? You place them over the sound tubes, they fit, as the silicone stretches over the tips.
As for the bass, they are balanced headphones, not bass cannons. If you were expecting the latter, you are not gonna get it. On the other hand, with the Ety triples and a good seal, the bass sounds present and accounted for when I listen to them. If you have a decent EQ, you can trick a tick or two on the bottom end. Otherwise, if all that doesn't work, they are not for you. Bad in the sense there is none, because certainly the DBA bass is never bad from a quality/punch standpoint. Again, seal is critical, but you are never going to get IE8 bass with DBAs, which in my case (and others it seems) is just fine.