rusbmw6

fi, i,Hi everyone. New to forom. Have recently retrofitted cic, combox, tv tuner, L7 amp with all L7 speakers and wiring from 2009 build e64. My question is: I only have sound from front doors and front center speaker. How do I get volume/sound from the rest of the speakers? I have not done any coding . P.S I also do not have sat nav highlited on display. Any thoughts much appreciated. Regards Russell's