Car rear door woofer Part numbers: 96390D9000, 96390D9000 Key benefits Reproduces lowfrequency sound in the rear door to enhance bass response Restores or improves bass when the original rear door woofer is damaged or underperforming Helps balance overall sound by extending the low end and improving stereo imaging Compatibility and notes Intended for vehicles that require part numbers 96390D9000 or 96390D9000 Rear door mounting design; exact fit depends on vehicle model and door assembly Size, material, and mounting details vary by application; confirm compatibility with your vehicle Performance attributes Focused lowend reproduction to augment factory audio without altering frequencies Use scenarios 1) Replacing a blown rear door woofer in a midsize sedan to restore bass performance and listening enjoyment 2) Upgrading a factory audio system in a compact SUV to improve rear bass and overall sound balance 3) Integrating into a custom car audio build where reardoor bass reinforcement is a priority for cabin sound quality