BTW, the alpha pads r almost the same size as the hd650 pads...just slightly bigger...90% sitting inside the rim.
u can simple scotchtape up the sides n u have a lambskin treat, if u are not particular of how it looks.
Or u can force squeeze the alphapads into the rim, n have a slightly distorted inner hole :P
Soundwise...i believe i lose a little of the lower bass, music sounded somewhat tunnelled/focused/brighter.
I am guessing u might like it on the stock cable..but i am using a spc cable, so its tending towards a T1 kind of sound.
(if u know what i am trying to say...hmmm)
Could you post some pictures? It sounds interesting...