Ive had the Senn CX55 streets which gave me the bass I wanted but at a loss of real mid range and little top.These AKG K 324P's give amazing bass,clear and precise mid range with enough top end to be comfortable with. They may only look tiny,but they pack the best sound for ipod playing. They sound so good and are so comfartable to wear,that as Im writing this,I just cant take them out in case I miss something that I didnt hear with the Senn CX 55's! Value for money and quality,they cant be beat!