B W Matrix 803s - Tighten up the bass

Try adjust the speaker position. All rooms are different, but usually corners have more boom. If there, move them out until you like the sound. Same for how close to the wall, just not as much. Furniture may matter. I am not an expert on room treatments or traps, but I am sure someone here is.

If all else fails look into a sub. When intergrated properly they can make huge difference.

After speaker positioning, next thought is to experiment with various different AC cords on pre/power amp (or integrated). Next is spiking your speakers to the floor; your stands are probably taking care of that? Also you might need to try some component isolation & vibration control: rack, shelving, cones, vibrapods. Room treatment: any stuffed furniture in the office (chairs, sofa etc.)? Drapes on the windows, ceiling acoustical absorbtion?

Better AC power cords will also tighten up bass response.

All responces are correct and helpful. In addition to eveyones excellent advice i have found that the cables and different combinations can make a profound difference. You are already using good equipment and cabling. Finding a good dealer willing to loan you different kinds and combinations of cable can be a very inlightning experience. This does take alot of patience and time. You will have to allow at least 2 or 3 days for different combos of cable to settle in, especially for the bass. For example i have experimented with Acoustic Zen Santori spk cable and Kimber Bi-Focal and MIT 2 double runs with a similar different ics, bal and SE, copper and silver etc. I have found with my system the differences in sound to be like night and day. All cables used are quality but different designs. I have found the Kimber Bi-Focal xl and even the less expensive Monacle X to be superior using a Stealth 20ft Bal silver M7 with my components. The Kimber's bass and the rest of the freq responce is magical. The difference in bass was stunning. What worked well in my system doesn't mean it will do the same for your situation or the next system. I'm just saying that trying different cable combinations can improve your bass. It is also very important to address what the others have already stated. Power cords can have the same effect. Anyone who doesn't think that cables do not make a difference have just not taken the time to experiment. My speakers are full range and the difference that cable has made is just stunning. Having some knowledge of cable can help save time in chooseing the combinations to try. Experienced dealers can also be very helpful. Reading here on A'gon is priceless. Some members are very very accurate and extremly helpful for someone willing to take the time and are serious about their sound.

Friends, thanks for all of the input. Bob Bundus, the room is small and has some small office pieces, one upholstered chair, carpeting and I have upholstered (with padding) the entire wall behind the speakers.

I am experimenting with new PCs. I just installed a new DIYCABLE PC to the integrated and moved the Black Mamba to the source (Ikemi). It needs time to burn in.

Joel

Joel I was wondering if it could be possible that the entire carpeted wall is just absorbing too much? If the floor is also carpeted + the stuffed chair then the room may be overdamped? Seems like, if anything, that would adversely affect your highs more than your lows, but I wonder? I'm not totally knowledgable or experienced regarding room treatments so admittedly I'm only guessing here.