I've read that if you send straight RGB from a pcb to a non-arcade monitor that it can result in a very dim image. Is this also true for "pro" monitors like this and the Sony PVM series.
I've also heard that some monitors have a thing called a clamp circuit that will allow it to switch between the voltages for arcade and computer levels. My monitor has a switch on the back, see here:

It says
Mode A <> Mode B
Clamp Sw
Is this a switch to turn the clamp circuit on or off? Does this mean I don't need to solder resistors in the video line for this monitor?