Systems and methods are provided for using one or more external Bluetooth speakers in conjunction with an in-vehicle Bluetooth-enabled audio system. Locational features or aspects of the external Bluetooth speakers and the in-vehicle Bluetooth-enabled audio system can be leveraged in a manner that allows for automatic or manual adjustment of the one or more external Bluetooth speakers, e.g., adjusting left/right balance of the one or more external Bluetooth speakers based on the position or location of the or more external speakers relative to the vehicle, in-vehicle Bluetooth-enabled audio system, etc.