Philips Fidelio X1 | Review & Comparison       Quick Summary (As compared to AKG's K702 Anniversary and Q701)     X1:  Warm and smooth but with a slight "U" shape, a little more of a "fun" signature, bigger bass w/deeper extension, mids less prominent and a bit more neutral sounding, slightly more treble sparkle.  Soundstage size is pretty similar to the Anniversaries, but with smaller instruments and a little more distant presentation.  As a result, inside the soundstage there is a little more spaciousness and room and slightly better...