As Phil says a Makie Thump 12A is not going to be as loud enough and powerful enough for bass as a bass combo. But, the Thump12A does offer a solution in some gigging environments. We have some regular gigs ,as a duo, in the bar of a small local pub and we use a Thump 12A and a JBL EON One Linear array. Bass & Alesis drum machine into the Thump12A and guitar & vocals into the JBL. It works really well for us at the volumes we need. My bass goes into Zoom MS-60B >> Tech21 VT Bas DI>> channel 1 and Alesis SR16 >> channel 2 of the Thump12A. The JBL line array copes really well without the need of any sort of monitors. I would agree with the other comments that the Mackie Thump 12A cannot compete with my Fender Rumble 500 head and my DIY Basschat 12 mk1 cab. Clearly for larger gigs you have to invest in one of the premium brands RCF , QSC etc.