Initial impressions were in-line with the other reviews on the forums: dark, overbearing bass. I immediately performed the astroid-mod (removing the black foam center from the pads) and also opened them up and lined the grills with tin-foil based on another mod I found on this forum. Wow! The sound cleaned up immediately with the highs and mids coming through clearer, although they still weren't where they should be, so I left them playing pink noise and sine sweeps overnight for a few days. These don't need an amp, but the bass does tighten up and...