What exactly do you think you should be hearing instead? Is the bass thin or something? You could experiment with placement, try moving them farther apart or closer, toeing them in more or less, moving them away from back and side walls. If you have a lot of hard surfaces in your room, you coud be hearing reflections, try putting a rug down or blankets on the rear wall to see if you can diagnose an issue. And as always, check your wiring and polarity.
Denon AVR-1713 | EMP E55Ti | EMP E56Ci | EMP E5Bi | BIC F-12