I just bought an EHX Big Muff and i'm trying to get a similar tone to this band (Spinnerette).. It sounds like fingers to me but i have nothing to lose to ask the experts in here...

Here are some songs..

http://www.youtube.com/watch?v=A942uSNSD_Q (listen the intro)

http://www.youtube.com/watch?v=mYesM4Rruus (1:47 sounds pretty clear)

http://www.youtube.com/watch?v=3FTGM_pR0Ec (intro and first verse)

I would love if anyone can describe their tone for me.. It sounds like they use just a little sustain around 3-4 o'clock and tone around 5-6. Ofcourse the tone comes from a lot of things (bass/amp/eq/compressors etc) I do like how it sounds with pick but i think i'm losing some low frequencies.. sounds thin.. I'll post a raw demo later so you can listen and judge

Alain Johannes is a multi-instrumentalist musician, but as far as I know, he plays the electric bass with his fingers.
"Maybe this world is another planet's hell?" - Aldous Huxley
Sounds like a P-bass played fairly aggressively with fingers and roundwound strings to me. Possibly with the tone rolled of some on the bass but fairly open on the pedal. Set the sustain to taste, it's obviously reasonably high. And don't use the bass boost, if you have the Bass Big Muff.

EDIT: Basing this off the first track.
Spare a Cow
Eat a Vegan
That's definitely pick with some of the fuzz's tone rolled off and a bit of palm muting.
Try it both ways. Which works best for you?
"Your sound is in your hands as much as anything. It's the way you pick, and the way you hold the guitar, more than it is the amp or the guitar you use." -- Stevie Ray Vaughan

"Anybody can play. The note is only 20 percent. The attitude of the motherfucker who plays it is 80 percent." -- Miles Davis

Guthrie on tone: https://www.youtube.com/watch?v=zmohdG9lLqY