How many hrs. of use does the spks. have them? Also, everytime you move cables around it takes awhile to settle down and the sound will get less edgy and bass should improve. What cables are you using? My gut feeling is that the Denon is no where near refined of an amp for the spks. Your spks. are revealing the shortcomings of your other pieces of equipment. I own some Paradigm floorstanders, the "Phantom" IV's. Driven by vintage Sansui int. amp and the system sounds superb. Don't give up the Paradigm's. Try a different amp.