Phil Smith said:In the real world, you have more variables, sometimes you don't know the size of the room, the people you're playing with or how many people are going to be at the venue. Coming to a gig without an amp under those conditions, i.e. so many unknowns, to me reflects lack of experience or a fanatical devotion to a purist ideal.
I think this is a good point - so, I have been going to my local Jazz club for the last 5 or 6 years and it has changed venue a few times, but is now fairly small and has been smaller.
So - I go every week and must have seen hundreds of gigs there with small Jazz groups, who are of a very high standard and are often on UK tours or coming down from residencies in London. So - in all that time I have only seen one DBer with no amp and the guy who ran the club said he never uses an amp as a matter of principle - but he had a mic going to the house p.a. and sounded great - but it made me think about Phil's comments and the concept of "professionalism". So - that DB player must play at lots of venues where there may be no p.a. or worse - a really crappy one, that won't project any bass...

So - is it unprofessional to turn up to a gig, unsure that you will be heard or will sound good to the audience?
As I say, in all other cases, the DB player has had a small amp, although at one gig, there was a power failure and the group carried on acoustically, lit by candles - as a trio of trumpet, DB and drums - although in this case the electric guitarist had to stand around twiddling his thumbs - guess they should have had a pianist eh!!!