Been using the Hifiman leather pads a while but wasn't quite satisfied with the sound, the stock pads with papertowel inserts still sounds the best. With the inner foam ring underneath the Hifiman pads (the pads comes with those installed by default) the FR got a slight tilt towards lows (slightly boomier/muddy but stronger lows and slightly muffled highs) while without it it's the opposite, the highs got a little more presence and bass slightly decreased (slight hint of metallic sharp highs that I don't like, I prefer the softer highs of stock pads).
So now back to stock pads, the bass and the overall balance is just perfect for my taste! The bass hits the hardest vs staying the cleanest while the mids & highs are also better balanced.
Edited by RPGWiZaRD - 5/17/13 at 9:18am