Which brings up the question - what is HE using for reference when he tells you he doesn't like his bass sound? On the same car stereo where he hates every other bass sound? I have rarely had a player where I couldn't get a sound he liked even if I hated it. It looks like the two of you are just in disagreement about how it should sound. I once had a bass player that I thought was so bad I actually took the band aside and said "this guy is not at your level." and he wasn't. But they wanted to keep him. My usual bass sound (as a mixer) was real clarity on the notes and attack - so you heard every note. I like bottom end but I don't think a bass needs to be artificially bassy. It's working range of notes makes it a bass - not its tone. That being said - with this band in reference they said "well, he's our bass player so we have to work it out." - The solution was to take away the clarity of his bass and just have it provide a floor for everyone else - and it worked beautifully. I am having a problem understanding what your bass player wants. I don't find bass to be an impossible to dial in sound based on the ideas we gave you about cutting certain low-mid frequencies. Once again - I shelve the lows to avoid rumble, I boost somewhere in the 100-250 range for "bottom", I make a narrow V bandwidth cut somewhere between 400 - 1000 Hz, (sweep to find it) and then I add a gentle slope in the upper midrange for clarity. Sometimes you need to cut sharply in the 1.5 kHz range, if there is slap or fret noise. What format or you working in? The ProTools 7-band EQ should do everything you want - along with a good compressor plug-in.