1 line 6 m5
2 digitech jamman
3 digitech bass whammy(new)
These are my favorites right now.
Note: i do NOT use the jamman as a bass looper. I use it as a sampler and it has its own di to the pa and does not go to my bass rig. I use it for everything from movie samples, bass drops, bass wobbles, other crazy sound effects and also virtual instrument parts.
I say that because i wouldn't recommend the jamman as a looper. The input sensitivity is way too sensitive for bass. I mostly put sounds on mine with a 1/8 cable and my iphone. A lot of the movie
Samples and sound effects are literally things i sampled right off of YouTube.