hey guys, sorry for the rather general and in-concise post. im only just getting back into my music love again. 
a few years back i built a few cmoy headphone amps and a bass boost model. 
now fast forward 4 years and i just got my self a set of grado sr125's and i am looking to build an amp that's a step up from the simple CMOy. 
just looking for some hints and tips aimed at a relatively new user looking to build a better amp.  
all input is appreciated. 
(also, side note. how do people get around the fact that every single 3.5mm to 6.35mm adapter is awful and causes crackling upon contact)