How to play music from iPad on Yamaha amplifier without AirPlay, but wirelessly?
Just buy 2 of this (or somthing doing the same job). It will transform any speaker to bluetooth speakers, so you will be able to connect any bluetooth using device to your speakers and get the sound wirelessly. You should buy one for each device you want to connect. You then can connect the two bluetooth adapter using this (not sure what it is called). If your aux uses RSA, you can find the equivalent for RCA connections.