After burn in and use several weeks, this 330 shows their true nature. Good controlled but powerful bass. Good separation and clarity, not very wide soundstage than Sennheiser HD 800 but just enough for music. Mid is recessed a bit at first become better and I use equalizer to enhance female voice around 200 hz. Treble is harsh and has a metallic edge at first but after some time it settled to a very interesting treble. I like this type of treble. High and crisp like sounds of nature. I bought velour for HD668 and fit perfectly. Now this cheap and rugged thing become my favorite for any music. Would like to buy another from them or China.