I have the Denon AVR-991 surround receiver hooked up with I have the Energy 10" Subwoofer (ESW-C10). The front speakers are the Energy Connoisseur Floor Standing Speaker (CF-50).

My issue is the loudless of the sub. Or rather the lack of much sound from it. I have confirmed that it's hooked up correctly and turned on. It is working, I can feel the vibration from it, however it just seems to be extremely little. My previous sub (harman/kardon surround set) was MUCH louder. I only had it on 1/3 and it would still be incredibly powerful.

I have tried to set the front speakers to "small" on the receiver settings but that still has no effect on the sub, it still hardly makes any noise. I have turned up the volume on the sub and even on the loudest setting it's what I would call "very quiet". I'd love for some more power, so at least on the loudest setting it would "pound" some more in the chest.

Any suggestions, I am not really sure what to do at this point?

Thanks