Im in need of a small amp to help push me above the guitars when we play acoustically. I have a Takamine 4 string and get completely lost (drown out) when jamming w 2 6-string and a 12 string and 3 vocalists. Sometimes we just show up, find a corner in a local bar or even out on a deck or patio and do an impromptu jam. So I was looking for something small, portable, light, but that can still deliver low end thick enough to fill in the bottom but not be too boomy. Im open to using either my acoustic or electric bass, whichever will sound the best. We are playing 70's music (ie. Doobies, America, BTO, Zepp...). Thanks for your suggestions...