Hi all, recently i just built my first CMOY amp by following Banzai guide. At the beginning it was just fine, and now when i play something on it, there is a lot of noise and the sound is cracking even on my friend's headphones. I dont know what i did wrong, could you guys help me out?  ...

Hi guys, i'm new here and i'm new in headphone stuff. I wanted to get myself a new headphone, but i'm not sure which one to get. mostly i'm listening to Pop, Classical, Blues, Jazz, and Acoustic. i have done some research, and what my friend told me to get is, Sennheiser PX-100ii, what do...