You might try varying the pattern if you do not like the results. sometimes reflections from other instruments not only cause the bass to vibrate, but will of course get into the back of you mike, possibly even causing phase problems. You may find that other patterns on the mic might give better results.
If I am using a figure 8 on a single source, I will try to point the rear of the mic at a baffle. The off axis response of figure 8 patterns is almost a total null, (the better mics achieving a higher degree of null), so it is extremely useful for rejecting unwanted signals from the side. However that still leaves the rear facing lobe that has the same sensitivity as the front lobe.
Maybe a hypercardioid pattern will give you the result you are looking for, though here again a rear baffle might be valuable.
Also, you will notice varying results depending on what other instruments are present and where they (and their reflections) are in the room in relation to the bass. By the way, is the bass on a reflective surface or an absorbent one? Is the player seated or standing? How perpendicular is the instrument to the floor? Is the bassist bowing or using their fingers? You may be hearing the reflections from the floor. Depending on how the instrument is angled, those reflections will change.
Originally Posted by springer
Something weird I have noticed lately... maybe some of you can chime in on why.
I have done several LIVE sessions with the fig8 414 angled up at the bridge a la some old photos I have seen. On these occasions I have gotten a great sound while some other sessions (either straight on or following the angle of the bass) results have been mixed or not as good. Now I would have thought with the polar pattern with it's strength angled down with the angle of the bass (full face) would get a better sound but this hasn't been the case.
Being a results oriented cat, I dig the facing up result.