Hey dont know if anyone can help. I have the Parasound A51 amp and C2 controller. I am not getting any sound out of my front speakers or the center , only sound is from the rear. I checked all the connections. Amp and controller hooked up useing XLR cables and all the speaker wire with banana plugs all tight.tried two sources my DVD and the Sirius satalite, still only sound from the rear speakers. Any suggestions . Thanks for your help.