#1
Is a Vox V9158 54w Combo amp loud enough to gig with? The audio will be augmented by in house PA.
#2
Hell yeah.

Ibanez SR506BM
Ashdown Little Giant 1000w
Peavey TVX 115+410
A big ass upright

#3
A 15w beginners crate amp would be loud enough if you have a house PA to mic into.