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
Room positioning is most likely the problem. I use Nautilus 801' s and they are very picky to how far they are away from the wall. You could have them in a position where the bass is being cancelled. How far is their cabinet back away from the wall? As far as Judy's response,either she hasn't not heard them properly positioned or driven properly as they are not anything like she described when positioned properly and driven properly. The Classical recording studios aren't using them as monitors for no reason. You have a great pair of speakers look elsewhere.
It is a crime to run those speakers with Adcom amplication. Two things as mentioned above, Room Placement and Amplification.

Chris
I have N802's which has 2X8 inch woofers. Trust me plenty of bass. Don't get me wrong it's not like bass that you would get out of speakers built for Discos ie, read boomy. More of a natural sound. I agree with above post that B&W Nautilis speakers need plenty of power 300 to 400 watts, high grade cables I use kimber Bi-Focal XLs. which made mine sing. Correct placement and a good source. I think these suggestions would apply to almost any speaker except for the power requirements. BTW 14 gauge depending on the distance from your amp may not be sufficient. You may want to go 12 or 10 would be even better. In my home theater I use a B&W sub with the 15" woofer same as the N801. It shakes my house so I know they have capable bass. If your speakers are two years old than they are still under warranty. You may want to really check them out to make sure that they are working properly. Get a test CD as recommended and do one speaker at a time. If you feel that they don't sound right call Chris Mcbride at B&W he'll be glad to help you.
I'd say it's the amp. Also, echoing what others have said, I find the B&W sound to be very neutral - you may have to "listen" for the bass moreso than with other speakers.
As an ex 800N owner I have to agree about them sounding lean. I auditioned nearly a half dozen amps from MBL to Mcintosh with always the same results. In fact I purchased my 800N's from my neighbour who was bi amping them with a pair of Levinson 336's in a beautifully dampened room with wood walls and carpet. He prefered his 800 Matrix and let me have his 800N's with a warning, wished I had listened. I guess it comes down to a matter of personal taste, had no problem selling them and received over 5000 veiws on my listing. Just my 2 cents, dont mean to dump on any happy 800 owners.