So, I just got the ER-6's and had another set of custom molds made for my ears. My first, impression, using them with the Westone molds, is they are thin sounding. I will have more time over the weekend to test them. But, just doing an A/B with my HD600's, out of a GoVibe headphone amp, the Sennheisers offer much fuller sound.
I'm very excited about the new molded ear plugs, as I also bought the Etymotic ES-15 filters for them, too. My old plugs were very muffled sounding.
I'm wondering if the ER-6's need a break-in period to sound better?