I am a fan of Sennheiser . If used cx -3.00 . Ie 60 of Sennheiser . But this time I bought this earphones for casual and rough use . It worked properly almost 1 month after that the left ear bud start to sound more than the right . It gives a feeling that hearing more in the left ear. Guys if you want to buy earphones with this price range then please go for Sennheiser cx 180 . It is better my brother is using that for almost one and half a year .