I have a Panasonic CQ-RX100U receiver (50x4 watts). I just bought 2 Dual 6 1/2 4 way DLS654 speakers (160 watts each) and 2 Dual 6x9 4 way DLS694 speakers. I use my aux and mobile phone to play music. My problem is the static when my phone volume is all the way up and my receiver volume is all the way up. The speakers are brand new, so I know it isn't the speakers. Is it because my receiver doesn't put out enough power to play audio to it's full potential? Should I buy another receiver or buy an amp?