Sell it. With most people using good PA then if you need to be louder, d.i. your back line into the PA. Keep your amp for you to hear and put tone in but otherwise use the monitors to hear each band member, don’t rely on the back line for those on stage to hear, you probably never will. This will also help you save your ears, less volume on stage means longer life for your ears. Tinnitus is no fun 👎