PlainTalk Jack: Requires 3.5 mm Plug

I am having problems using an audio cable from my stereo into my Power Macintosh computer. I cannot get a consistent signal, I sometimes have to wiggle the cable in order to hear the audio. I have tried several cables, but all of them do the same thing.
The PlainTalk sound input mini-jack is a standard 3.5 mm diameter. The symptoms you describe occur if you use 1/8-in connectors instead of 3.5 mm connectors.

The differences:When a 1/8-in. plug is used, it is prone to cutting out and having excessive noise on the audio line. To prevent this, you should use a 3.5 mm connector instead of 1/8-in.
Published Date: Feb 19, 2012