You have two things working against you here:
1. You don't have enough amp. (without PA support)
2. The rest of your band is too loud.
There are only two solutions.
1. Get more speakers (and really a new micro head)
2. Get a less loud band.
Personally I gig with a GK MB200 head into (2) 210 cabinets and I could easily overpower my whole band. And my drummer is a beater,(but he is good) God bless him.
1. You don't have enough amp. (without PA support)
2. The rest of your band is too loud.
There are only two solutions.
1. Get more speakers (and really a new micro head)
2. Get a less loud band.
Personally I gig with a GK MB200 head into (2) 210 cabinets and I could easily overpower my whole band. And my drummer is a beater,(but he is good) God bless him.