So far my HE-6 has about 35 hours of burn in. I did listen to it right away out of the box. I never thought my LCD-2.2 was lacking in detail until I heard the HE-6. I suppose one doesn't know what they're missing until they hear it. The LCD-2.2 does have more bass impact, especially when listening to Daft Punk. However I do find the HE-6 to have a faster and more quality bass with my metal. I'm still hearing bass guitars really well. Even though I do like more bass, I find myself liking the extra top end in the HE-6. Unfortunately, my HE-6 arrived with a defective cable. The right connector doesn't screw on tightly. It is a major pain to get the threads going, and once they are going as soon as I try to get it tight the threads slip and it's loose again. I know I'm not over doing it as the left side goes fine, and I even tried out another cable I had come with my Emotiva amp for the Hifimans and it went on perfectly. The stock cable with my HE-6 also has a tear in the covering on the right connector; I can see the copper wire. The headphones were sold by another company and fulfilled by Amazon. I'm wondering where I should go with this as I don't believe that company carries the HE-6 anymore. I'd hate to send the whole unit back and have to wait for a replacement, but I really feel that I should get a proper cable when I pay this much for headphones.