Home >> Land Rover >> 2021 >> Range Rover SVAutobiography Dynamic Blk. >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Audio Amplifier Module (AAM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Audio Amplifier Module (AAM) (G2187165) >> DTC B1A12-1A: Speaker #12 - Circuit resistance below threshold >> Possible Causes