Yes, lots of vocal harmonies I'm afraid!
None of the guitarists use backline - straight into PA via their FX/DI as they are acoustic instruments (guitars, mandolin, banjo). At the moment, my bass rig provides all my bass.
I've had a quick look at the Mackies you mentioned and the review I read said that if i wanted to put my bass through it, I would need the subwoofer too. From what I've told you about our band, do you reckon we'd need a powered subwoofer as well as the mackie 450's?
Sorry about all the questions - I want to get it right this time! When we started, there were 4 of us and we were playing in tiny pub backrooms. Now venues and crowds are getting a touch bigger, so we want to be equipped to play to 100-150 people. For example - this weekend we did a golf club function with 100+ up-for-it people dancing. Volume was absolutely fine but the room was wide and we were playing across it rather than down the length of it.
Cheers again!
Chris