You're a solo act right?

Just get 2 subs and you'll be fine.

You CAN get away with one, but it's nice to have the extra headroom and richer tone - you don't HAVE to turn it up, and of course you have the option to just bring one sub with smaller venues.

I operate on the principal that I'd rather have something and not need it, then not have something and need it...err or something like that!

Please feel free to ask anymore questions either publicly or via email before, during or after your gigs.