[quote name='dannybuoy' timestamp='1485614949' post='3225324']
EVERYONE needs a dirt pedal for bass!
[/quote]
or 5..............
to the op, if you want the dirt to not be to fuzzy or fizzy then avoid rat based circuits i love them but at high gain they turn a bit fuzz, obviously i would stay away from fuzz.
for a proper thick sound which will just push your bass over the edge theres stuff like the ocd, the fuzzrocious demon is great from low to high gain and doesnt get fizzy it stays for me in my setup just thick drive unless i boost into it!
and theres also the boss odb-3 for a really cheap way to go, have it basically 80% clean blend turn the treble down a bit, i used this with my active modulus fb4 for ages into a markbass lm2. and the fb4 being a hotroded ray its similar kinda thing.