This is a bit confusing, because I think of a female RCA connector as a "jack," not a "plug." I wouldn't expect the connector to have "flaps," which I associate with a male "plug." But perhaps I'm just misunderstanding you.
In any event - and without trying to start another Cable War - it sounds as though you have cheap connectors. I think one of the biggest differences between high-end cables and run-of-the-mill cables is the quality of the connectors. Good hi-fi connectors should fit snugly. So at a minimum, I'd replace the jack or plug, or consider new cables altogether.
In any event - and without trying to start another Cable War - it sounds as though you have cheap connectors. I think one of the biggest differences between high-end cables and run-of-the-mill cables is the quality of the connectors. Good hi-fi connectors should fit snugly. So at a minimum, I'd replace the jack or plug, or consider new cables altogether.