Make the bass dirtier, that's what I reckon. This has a dry output and a toggle for drive or fuzz, but mostly, it's just here to scunge up the low end of your mix good and proper. 

Model: Electro-Harmonix Bass Blogger
Made: NYC USA, recent model
Type: fuzz.overdrive
Power: 9v negative supply or 9v battery (not included)
Switching: true bypass
Equivalent new street price (approx): $185aud
Mods: none
Accessories: original box and docs, no power supply
Condition notes: used, no major marks, fully functional. Overall: excellent condition