Advice, android and dac in car

[rayray881]

I just got a Moto X phone and am looking for the best sound possible in the car. The audio system in the car is top notch, but I like to listen to Spotify from the phone. I tried a bluetooth receiver to take advantage of aptx but it cuts out frequently. Is it possible to use a usb dac with my phone and run it into the car stereo. The stereo is a Pioneer 80PRS and has several inputs, no digital in though.

 

[DanBa]

Moto X & standard USB DAC:
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/5655#post_11033613
 
Car USB audio:
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/5490#post_10963953