Ha, I'm going to see how long I can look past the vibration...but once you have heard it, it is tough to ignore. Love this speaker otherwise!!! I have not heard a bt speaker come close on crispness and solid lows. I have heard the Bose mini 2 does well, might have to check that out.

I have the Onyx 2 and I too hear the vibration at ~30%. It sounds like it is caused by the rear radiator cap to me. I really love this speaker, but annoyed by the vibration on intense bass. Let me know if you were able to solve it. I'm thinking I might try to do something with the seal of the...