These headphones sound so good. I havent given them their full burn in time but they already produce such good sound and the bass is perfect, not too much not to little. I am impressed with them. As to construction, these are SOLID. Others have complained that the cable is too thin and wont last. HONESTLY its not that thin, and it feels VERY rugged. I am CONFIDENT it will last a long time. As to the tips, the ones it was wearing when i got it turned out to be a perfect fit i didnt need the others. As for the noise cancellation it works quite well, Put these on and turn on the sound and outside noise will be blocked. If there is louder outside noise simply turn these up a bit. THIS IS GREAT FOR LOUD KIDS, NAGGING WIVES/GIRLFRIENDS, BARKING DOGS, ANYTHING.....This is excellent quality from klipsch 

Question: How was the bass?
Answer: the bass is perfect