I use the SS3 exactly this way; it's my on-stage monitor; my keys go through the mains. It's terrific. We're 12 piece cover band, and I don't have any very low end (for some of the latest hip hop stuff) on stage, but the mains take care of that just fine. I used to use two QSC K8s on poles pointed at my ears. I prefer the SS3, no question. The band hears me better, the stereo sweet spot is not isolated to just me. The K8's are higher fidelity, but I am about the happiest I have been with my on stage monitor using the SS3. And I've tried many amps.