I would like to suggest another solution.
Try an FM transmitter.
https://www.amazon.com/Nulaxy-Wireless-Bluetooth-Transmitter-Adapter/dp/B018E0I01I/ref=sr_1_3?ie=UTF8&qid=1494050965&sr=8-3&keywords=fm+transmitter
Connect to the above device using your phone's bluetooth.
The above device should then be set to an FM radio station where there is no music normally on the radio.
Tune the radio to this channel, and you will be able to hear music wirelessly.