I bought this sennheiser CX 180 .I didnt like this headphone at all.The sound quality is very poor.The bass was not good.After 4 months of use the left side of the headphones stopped working.I was pissed off completely pissed off.So I requested for replacement and I got similar model headphone and I was shocked after using it.It had similar problems and again one side of headphone stopped working.I am very disappointed with sennheiser.Rate of this headphone is very high and moreover the quality is very bad.I learned from that experience that I should never buy from sennheiser.Now am using skullcandy headphones which is very good.