If you have RCA connectors that have become loose over time you can use a pair of small pliers to gently pinch the “teeth” of the RCA connectors to bend them in just enough to make them fit tight on an input or output jack. Be careful not to pinch too hard or the “teeth” may break off.
How do you know if your RCA is bad?
What causes RCA cables to go bad?
Do RCA Cables Degrade Over Time? RCA cables degrade for the same reasons that HDMI cables do. They have exposed metal connections, and the joint between the cable tubing and the plug is vulnerable to wear. Because the plug is a single electrical signal, it won’t be as susceptible to signal degradation due to rust.
Can an RCA connection be balanced?
Some connector types are inherently unbalanced, so any time you see them present, you know that particular connection is one half of a balanced signal, or a single unbalanced input. RCA (or phono) connectors are always unbalanced, as are TS ¼” jacks.