Pros: Defined Bass. Punchy, very present, not overpowering. Great lows and mids. Clarity is amazing for its class. Amazing isolation.
Cons: Some of the highs can be distorted at times.
I first purchased these because I wanted something good to use. Everyday travelling to and from school/work would take me about 3 hours (round trip); so having good quality IEMs that isolated me from the noisy bus and other distractions was something I wanted to have. I saw these in-store and thought I might as well try them. I've heard of Sennheiser before but was the quality as good as its claimed? (mind you these were my first pair before I really got into audio/headphones etc). Equipment/Music: I thought it might be important to state this. I used my Cowon J3 with custom equalizers (found here on head-fi). No amp. The music I listen to is pretty much anything;...(read more)