I'm currently in the process of designing my own desktop version of the Objective2 amp, and have pretty much everything sorted, except for what type of 1/4" jack I want to use. I see that there are open and closed circuit jacks, and to my understanding a closed circuit jack incorporates a switch that closes when the connector is removed. Am I right in thinking this?
I have read that if the switch is used to ground the channels when the connector is removed it eliminates noise that could be caused by the unoccupied jack. I know I wouldn't normally need this, because it is an output, but I plan on keeping the 3.5mm jack originally specified in the design and adding the 1/4" jack as well. Would having the closed circuit jack (i.e. grounding the channels on the 1/4" jack when it is unoccupied) affect the 3.5mm jack in any way?