I played a short set with a singer/guitar player tonight. I have a Fishman BP100 that normally has a very harsh tone. I usually use a Sansamp bass driver as a direct box, which helps a little. The sound man suggested that I use his Demeter mono tube direct box, instead. What a difference! The fishman lost its clanky harsh upper mids. It has almost persuaded me to lay out the substantial jack for the box.