my .02 is this......
I agree with Petebass and Jabberwock777....I have been a professional engineer and musician for over 25 years now and I can tell you that in that time I have learned that it is far better to ask a musician what sound he/she likes or listen to the sound they are playing and make a judgement about "their sound" than it is to say hey use this, trust me!! I tend to use a couple of techniques to get sounds I "like" while incorporating a way to get the sound the player likes.....
I ALWAYS use a direct box which will capture the essence of the bass itself (be aware that extreme settings will however, yield extreme results, meaning I always make sure that the preamp on an active bass is not too bass or treble heavy and that the "fundamental" sound is bassically what the bassist likes)
I ALWAYS ask if they are satisfied with the bass sounds in the cans and let them listen to their sound in the control room....I do the same for ALL the musicians on the project, I agree that this takes a few minutes to get the tones happening on the "rough mix" but a competent engineer should be able to do this in less than 10 minutes with a 6 piece or so band......IT IS WORTH THE 10 minutes you are paying for because if the muscians feel that their sound will come through they will play better and be more likely to trust the engineer when he asks them to try other things.
The bottom line is this....ASK the engineer to let you hear what your track will sound like MIXED (EQ, Balance, and compression if necessary are all things that take a GOOD engineer about a minute to get ESPECIALLY on bass) before you really get started doing a lot of tracking....if they are unwilling or unable to do that kindly remind them that if you are not satisifed with the sound you are PAYING for, then perhaps you should be somewhere more accomodating......I don't know a SINGLE engineer worth their salt who would be surprised by a request like this and I know none that would not accomodate you......YOU GET WHAT YOU PAY FOR is only true IF you know what exactly you are paying for....
I would not be surprised if it sounded "better" at mixdown, BUT I would not be surprised if it was not "the sound" you are looking for either.....Make sure you get "your sound" to tape and don't rely on someone else to mold it in the mix because if it is not "there" to start with, you will not get it "there" no matter how much time you spend mixing it!! Best of luck to you.....
Peace,
T
PS - you may find this thread helpful to.......
http://www.talkbass.com/forum/showthread.php?t=173311