I use these headphones for two weeks
I compared it with the Sony HD 480, same price range
The sound is good, especially in view of the price, bass are present and firm, i like trebbles, especially since I have a hearing loss of high freq. Compared to other headphones, sound definition is better
Noise, depends on used source, one can perceive at high volume, but it's no annoyance at "normal" level. Also, you really have the record to be weak to be perceptible trs.
In my case, I plugged into the amp or the computer, I have no problems and believe me, I'm quite demanding about sound quality. Very good quality-price ratio; Obviously there are better headphones, but also more expensive
I'll choose it again.