I have an AI Clarus and - as others have said - it sounds better with DB, likewise I at one time had an EA Micro 550 which was better with DB.
HOWEVER, in each case this can be rectified simply via a warm-sounding preamp (eg Sansamp BDDI, MXR M80, EBS ValveDrive, etc etc) or overdrive pedal (TC Mojo comes highly recommended on BC for a low cost option, or Darkglass Vintage Microtubes for pricier option).
I have an EBS Valvedrive (valve-driven preamp) and this helps my my electric bass sound fab through the AI.