clean as clean can be.
depends how you set it, and hook it up. It will really boost the preamp of your head/amp in tone if you hook it straight in, then depending on your amp and its settings if it will be clean sounding.
If you just use it alone as a DI, like i do for recording and live(its all i use live, no amp, no cab, just my bass, pick, fingers do the talking) then it will in my opinion make your bass sound clean as any definition of clean you can think of and cut through the bottom end of things.
do what i did, go into your music store of choice, hook up a bass rig through the pa system that is set up at the store. mic it and DI it throught the head.
then run just the sansamp through the mains
compare the sounds you hear.
i gaurantee youll go with the sansamp. The only downside is this. How important is your stage sound to you?, what kind of sound systems are you used to playing through? you are at the mercy of the stage monitors at whatever clubs you play at, and your sound isnt right there next you like some peeps like.
If you just need it for recording then for sure get one. If you want it as another preamp to your rig, then you need to play with it a little to see if it is right for you.
YUP !!!