These headphones get much better after the recommended break in period (Hifiman says 150 hours - I heard the positive difference before that mark) and using either the "FocusPad" or "FocusPad-A" ear pads. Both are sold by Hifiman and offer two slightly different sounds. Both affect bass in a positive way in my opinion - bass has more punch and impact due to the pads leaking less low frequencies. Either way these headphones are a great value and I look forward to matching it up to the right amp.