It is a switching supply. I had used a few of the linear supplies in the past but they are big and generate more heat. So far I have not had any issues or noise from them.Rich, is the Astron 25-amp power supply you are using to power the cabinet a linear or switching power supply? I have a similar setup but smaller of course and several of my devices have recommendations for a linear power supply source of power. I am hoping to also get rid of all of the wall warts and move to using a powerpole junction box.
I have also used a Samlex 1235M, it works well but the fan comes on and is loud, the Astron's are silent.
I would like one that has a voltage/current display on the front panel with a 1 or 2u rack-mount. If I see one I might go to it. I like the display power strips that iMonitor posted but I want the display to be seen outside the cabinet.