Android Question

is there any way i can stream the music stored on my phone to my home hifi? like a receiver that plugs into my home amp and i just send it from my phone so my phone doesn't have to be hard wired to the amp, I've got a bluetooth adaptor that plugs into the amp and my phone just treats it like bluetooth headphones etc, its exactly what i want, and very simple but the range isn't great, any ideas?