Just received this item yesterday. Well, my first impression OOTB is the bass is quite deep and big... too big for me. It is also a little bit boomy. Mid is OK for me. A little bit recessed. High is not bad but not detail and sparky enough for me. The build quality is quite nice, combination of metal and plastic housing. Considering the price, I think its still OK. But I'm definitely selling them due to the bass. The sound signature is not into my liking. I prefer piston 3 than this hybrid. Just my 2 cents.