I agree with the node suggestion above. I have NHT T6 towers (pretty much the 3.3's replacement) and the bass is not powerful unless you are in certain spots in the room. Being that they are tower speakers, they don't offer the placement flexibility of a monitor and separate sub - you're kind of stuck with what you get. I did add several standalone subs in the room to help balance things out. The woofers are only going to get down into the mid 20's before they start rolling off, so subs will be useful anyway to get the very bottom frequencies.
Lack of bass in NHT 3.3.
I recently failed to sell my pair of NHT 3.3's to a local(Dallas/Ft. Worth) buyer who remembered selling them circa 2000 and feel mine are not putting out enough bass volume. As you may know they are noted for the bass from the 12" side firing woofers. I followed a suggestion and removed the jumpers and connected just the subwoofer input and was able to verify signal. Since these are perhaps subwoors rather than traditional drivers I am not certain how loud they are supposed to play. My two part question is are there any 3.3 owners in the area willing to let me visit to hear your speakers and has any 3.3 owners run into a similar issue. Many thanks, LS