I just purchased a karaoke machine and I would like to attach better speakers to it, just so I can play music (not much of a signer). There are a few RCA ports on the back for Audio In/Out and one for video out. I purchased two mid-size Phillips speakers that have RCA connections on the back. I have tried plugging the RCA cables into audio Out and an aux adapter into the audio In but when music is played through the aux it just comes out the machine's speakers. I have tried the speakers on my computers stereo system and they work. What am I doing wrong?!?