i have been using sony mdr-ex50lp for sometime. but one day, while traveling, i slept off with it in my ear. when i woke up, one no sound comes from the left bud. so, now practically its useless now. so im looking fr a new headphone in ear type. i do like very bassy headphones. can anyone suggest me some? and it wud be wonderful if anyone could tell me wether my mdr-ex50lp can be repaired..