Interference from front left speaker in V50 in AUX mode

[jimv50]

Hi,
Car is a 2006, V50,2.0D SE
I've got this low pitched buzzing interference from the front left speaker , but only when the AUX mode is selected.
Using the radio or CD player is fine, no interference at all, sound is good and strong.
Volume increases when the volume knob is turned, as you would expect, and doesn't go away or is changed by use of iPod,mp3 player or smartphone.
There is a SEricsson HCB-700 bluetooth kit fitted but I am sure it is not causing the problem as it doesn't go away when the power cable is removed from bluetooth kit box.
Anyone got any ideas or advice ?
Jim

[M-R-P]

Most likely the aux cable mate, try a different one and see what happens :)

[jimv50]

Sorry I wasn't clear enough at first.
Interference is only on the left front speaker, all the time when in AUX mode.
It doesn't change whether an ipod etc is fitted or not.
I've tried all different cables, phones etc. as I thought at first it was on all the speakers, it was only today that I eventually noticed that the interference is coming out of passenger(deaf to music wife) side.
It would be a simpler fix if it was all the time in all modes, but not proving to be that easy.