Scratchy noises could also be one of the 4 x DC blocking electrolytic capacitors visible in the signal path
Easy peasy stuff to repair. I used to live and breathe this sort of repair work.
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.
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