Not sure if this is your issue but......On using the 3.5mm plug/connector. I was using my earbuds with the Honda 5 pin connector and a headphone adapter and when the male end is plugged all the way in, I lost most of my volume. Turns out that there is a conductive piece at the base of the plug and when it came in contact with the receptacle, it would lower the volume. Had to pull connector out @ 1/16"