Hi, hopefully I am just missing something simple. Trying to get my new 505 going and I am having trouble. I am running stereo with monitor 70's. My receiver is an onkyo 603. I started using the sub out to the LFE, nothing. Then tried wiring through the 505 and back to my speakers. Well my speakers work fine but nothing from the sub. Light is on and green. If I turn the crossover all the way up and the volume all the way up, I get slight SLIGHT noise from the sub. If I turn the volume up, the bass volume on my speakers goes up. Any ideas if I am doing something wrong or should I call?