I recently picked up the Blou and as far as sonic improvement, it's almost like a different pair of headphones. The bass is much improved and the clarity is improved. Actually, I ended up having to turn down the volume on my HeadRoom Home with the Clou cable as well. It's one of those things that you can't almost believe and with the HD600 now under $250, adding the Clou cable seems to be a must.
