BuckbrickYou could connect them directly with the right adapters/cable. You would need a 1/4" male mono to RCA Male cable for each channel (left/right) from the back of your bluray player. They do make these cables, check sweetwater.com or amazon.
BuckbrickYou will need some way to control the volume. Also, the best results are obtained by connecting using XLR cables. Best way to do this will be to use a small mixer. If you connect it using RCA cables you may get some hum and crackles etc.