Here's the answer about the pulse and the converter.
http://www.audioasylum.com/forums/amp/messages/13/135611.html
You need a pulsed switching module and the Xantech 599-00 pulsed switching module apparently does the trick.
http://www.audioasylum.com/forums/amp/messages/13/135611.html
You need a pulsed switching module and the Xantech 599-00 pulsed switching module apparently does the trick.