Saxo Speakers Playing up!

[SuperDry]

Ok this sounds weird to me but my saxo speakers are playing up! The back 2 speakers will play music as the front ones dont but randomly the back speakers will pop and switch off and the front ones come bursting into life!! then it jumps to only left side and then for 20 mins or until I stop the car it goes back to the back speakers and really its just random..

How can I fix this issue? All the wires in the radio are secure and show no signs problems?

Water in the wires? all the fuses are fine? Tried changing the balance but no difference so I really don't get it!

[tarzan]

maybe corroded door connector pins? have you tried a different stereo

[stevo67]

Front speakers maybe to deep & they're shorting on the metal of the door.