The other day I was comparing some amplifiers such as the McIntosh Lab's MC501, Pass Labs' X600.5 and Simaudio Moon W-7M. All are great amplifiers and can be used to drive a wide variety of speakers at any load. I was looking for the best amplifier, among these three, to be able to drive and control a difficult speaker such as the B&W 801D. According to their respective manufacturer's specification, the McIntosh MC501 has a damping factor of about 100; the X600.5 around 150 and the Moon W-7M a damping factor of at least 1600! While their rated output is fairly similar and all are great amplifiers, is it possible for the Simaudio to have a DF much higher than the other two? Does this mean the Simaudio is the best of the three to handle the 15" woofer driver on the 801D?