I just purchased the nexus 6p and connected it to my cars Bluetooth. I adjusted the settings in google music but it is just to low. Any recommendations?
There's nothing you can do about it unless the car manufacturer has an update for the car's audio system. Bluetooth specifies how toget data from one device to another - it doesn't specify levels, data formats, what kind of data, etc. It's still going to be years before we reach that level of standard for Bluetooth.