the programmeble bass driver doesn't have a paralel (uneffected) out like the original has. i found this limiting in the studio beacuse the miced signal will sound (very much) the same as the DI signal wich leaves less possibilities to shape the sound in the mix. however i usually end up just using the sansamp signal anyway, always sounds great. and it's really easy to be able to store your presets in case you need to do some punching in later in the recording process than you would have axpected (oh, are you playing a major? i always played minor there blahblah, you know that stuff happens)