Here you go! For me, the stock sound was great but the mids were a little veiled. It was almost as if vocalists were singing with their mouths covered by a thin blanket, for lack of better analogy. But with the mod, the mids cleared that issue up a lot. I should also mention another small mod that I did to my MA900s, I bought the Dekoni velour pads that were intended as an upgrade for the Beyerdynamic DT 770/880/990 on Amazon. The fabric of the stock pads were a bit uncomfortable and hot on my ears after a while, and I found the velour was much softer, with an added byproduct of bringing up the bass just a tad, as the foam in the Dekoni pads offered a little more isolation around the ears.