I was wondering what are the factors you take into account before saying that the plugs are good (or not) on a cable/pedal/bass/amp/whatever. It seems to me there aren't many objective qualities, at least that I can see. Ok, reliability is one. But I can't think of anything else. It's not like cables, where you have the shielding and the capacitance/m to take into account. So what makes a Neutrik jack better than a Proel?