I'm unfamiliar with that receiver, but I noticed HUGE improvements in sound quality when I switched from a circa '94 Onkyo receiver to an '02 Denon. I've determined it was likely the difference in the '94 Onkyo CD players processors vs. the modern Denon processors. If you aren't using a digital out from your CD player to your receiver, I would suggest you try that and then see what's what.