2005 9-5 right corner dash speaker hum after hitting a bump

[J McGuire]

2005 9-5 Combi with touchscreen/GPS OEM unit. Right dash speaker will start to hum, usually after hitting a bump on the road. I give the dash a mild spank, the hum goes away until the next time. Its a hum that is not speed /volume related... it begins and stays a constant tone. Sometimes turning radio off stops the hum, sometimes it does not. I have switched speakers side to side, no dice but it didnt show its face for about a month after the switch then today, boom... buzz...


thanks in advance.

[DanielZ]

so, you swapped speaker elements and the problem is still on the same side?
Not an electrician or anything but when i comes to speakers humming/buzzing I've only seen this happen when cables have exposed leads or connectors are touching some other part of an active system.
Have you checked the connectors and cables? If spanking the dash helps it might be a wonky connector in the back of the unit....