I sent my Ety 4Ps back to Headroom today. I thought they were clear and detailed but even classical needs decent bass! I was listening to Andrew Manze The Rosary Sonatas by Biber and then pulled out the etys and put on my HD280s and the bass made a big difference! I always thought the etys would be fine since I wanted them mostly for classical - but no! Not very good in my opinion for classical. Maybe for violin solos but not for orchestras. (Of course just my opinion which differs from most people here). And yes, I tried the foamies and pushing them in tighter etc, etc. After three weeks I didn't hear much difference as long as I had them in far enough. Also, tried them with a good amp (portaphile) and P->S cable. I did get used to the lack of ambience - that was the main problem at first. So, not enough bass for average classical music, let alone viola de gamba (bass heavy) classical or rock and pop. Just interested in sharing my perceptions. I will probably try the UM2s when I get the refund.