Our other bass player in the punk band uses an Elf - at rehearsal into my large Precision Devices 15" cab and for gigs into a 4x10 with Celestion speakers. *
He uses a Sansamp as well, but we constantly have to tell him to turn down - and the rest of us are quite loud...
And I use a 1200w Crown power amp into Markbass 2x10 and 4x10 for home practice. It goes loud as well as quiet!
*both cabs have a sensitivity of around 100dB/W@1m. So that's 100dB of racket for 1W going in, 103dB for 2W, 106dB for 4W, 109dB for 8W, 112dB for 16W, 115dB for 32W, 118dB for 64W, 121dB for 128W.