[marmul]

I just recieved my Ety Er4s. I currently own the er6's and think they sound better than the er4s. Will the Er4s get better w/ some break in time?

 

[mycoman]

Not sure about break-in time or effect but make absolute certain you have a really good seal and that they are inserted deep enough into your ear canal. Not doing one or the other correctly can have a huge impact on sound quality.