The PowerMasters furnish conventional power to the track allowing operation of traditional trains that would normally be operated by cranking the handle on the transformer up and down. The power master just goes in series with the ZW output and allows you to use your cab handheld remote instead of standing over the ZW. What I and others are saying is after going all-in with TMCC when it first came out many of us found that running conventional trains was easier and more fun standing over the transformer and cranking the handles than hooking up the PowerMasters and adding another electrical layer to the layout.
Here's a tip for you MTH early Protosounds users. If you want to use a Powermaster to control your early MTH Protosounds engines pick up a 75uF 50v or greater non polarized capacitor and attach it across the PM output.
