Since I (obvously) can't record a bass amp in my apartment, I do it "the Fredman way". I.e bass guitar -> DI -> preamp/compressor -> soundcard -> hard drive. The recorded sound is nice and clean, in fact at least as good as the raw tracks from our album recordings that were done in Studio Fredman. So the problem is to be found elsewhere.
After getting the clean sound to hard drive, Fredman uses the Sansamp PSA-1 plugin for bass, but that's only 33.3% of the recipe to success... the rest is EQ and compression, and THAT'S where I can't get it right. I have a really hard time figuring out what frequencies to keep and what to get rid of... I usually end up reducing at 200-300Hz because it seems to interfer with everything else. Then I compress the hell out of it, but I get the impression that I still have dynamic problems... some notes sound fine, some can't even be heard. Should I try some multiband compression?