I have rca outs from my deck into a Clarion PEQ460 equalizer with AUX.input. Everything is fine with no noise from either input. Trouble is when I hook up my portable DVD player to the AUX. input. There is a little bit of noise with everything hooked up (dvd player plugs into cig. lighter for power)and EQ on AUX. but when I switch the AUX. off then there is lots of hum until I unplug the rca's from the DVD player. Anyone have a solution for this?