I heard that the Monster Tour headphone always had a serious problem, like technical issues over a short period of time after purchase. Some of the issues like decreased in sound quality, low output of sound etc over short duration. Is this true? If not, then can i buy this headphone? Will it be worth it? I'm a bass head. Please HELP!! any other alternative would be highly appreciated,. But i want headphone with tangle-free cord, and a good BASS!!