Possible Causes
WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Circuit reference - LEFT_FRONT_MID_POS/LEFT_FRONT_MID NEG
- Front left door mid-range speaker circuit open circuit, high resistance
- Audio amplifier module internal failure