Thanks for the review. I read it on headfonics but like you demand. I will comment at here to let you know that I really appreciate your review. The Mad Dog or the Alphad Dog is on my list now but I just have a Jdslabs C421. I ask someone and they said that C421 does not drive Mad Dog in justice but not bad at all. I think I have to accept that but may be 70% of the power of Mad Dogs is enough for me.