I had this exact same frustration/question when I got my Proceed amplifiers. I had them connected to my Anthem AVM20 and sure enough, the Proceed amplifiers wanted a pulse on and off and the Anthem like all newer processors only did a constant 12v current.
The Xantech 599 does the trick. I documented the steps and how to connect here:
http://pooraudiophile.blogspot.comIt works flawlessly and highly recommend the Xantech!
