B&W Nautilus 800.....where's the bass?


Is it a well known fact that these speakers lack bass? I just bought them used...two years old....and am very dissappointed in the low end. My CDM 9 NT rears have more bass than these. No kidding. Is this a known problem with this speaker, or could there be something wrong? Since the 9's and the 800's are playing at the same time on the same system I do not think there is any need to list the equipment, but I will just in case it matters.
Sunfire Theatre Grand 2 processor ( all speakers are set to large)
Denon 3910 CDP
Adcom 300 by 7 ( 800's are bi amped with four of the channels.....phase is correct)
speaker wire is 14 guage in a very thick outside jacket
Thanks for your help.
baffled
Ok, I am already at 300 (questionable) WPC and it does not seem to be enough. I did move the speakers to 6 ft apart (from 10 ft) and that made a noticeable improvement. I am paying close attention to the advise from snickelfritz (something I never thought I would say out loud) and it makes sense. However, those floppy little woofers sound pretty good to me. If I could get the 800's to work half as hard as the 9's do it would be nirvana. Curious to see what the new amps and cables will do.
Nothing personal snickelfritz....it's the name, not the advise!
Avent91.. Transparent Cables had a fairly significant positive effect on the sound reproduction with my 800N's. Important though to use Transparent for all cables, I/C and speaker to realise the full effect. The 800N's have the ability to produce accurate and tight base in an effortless manor with the right amps.
Arcoleo, Thanks for the suggestion. I will try repositioning the speakers first. If that doesn't work, then maybe I'll try different cables.