Let me clarifly it for you.
Think on a C# standard tuning. Drop the Low C# string a whole step down and you get "B drop" tuning (B, F#, B, E), right?
Now go a whole step down on all strings and you get an "A Drop" (A E A D) tuning.
I play guitar, i'm not a bass player and i (we) play in drop tuning for a long time. It's better for agressive, heavy and fast stuffs, way easier to play fast power chords on the guitar, the bass just need follow its root.
That's not strange, it's a little adaptive for what sound best on our instruments and what suits better the style, live or (mainly) in the studio and of course for our playing comfort.
We were used to play on Bb Drop, but the bass just messed everything up in the low end for the fast stuffs then i moved the tuning a half step up and i got a very nice/comfortable string tension on the guitar, it sounded much better with 0.13/0.56 and feels much better too.
Tuned up the bass and it got a little better than Bb, but not so much as the guitar did but better. I believe a better equipament\instrument (with the right choice on the strings

) will do better for B drop or even A Drop tuning (which i prefer!). I must say i love A drop and that's where i hope to get!
I just want to read what ppl says about what would be the right choice of strings for those tunings.
