I would just keep the K12s. They work fine. Just keep maximizing your income and keep expenditures to a minimum. I don't like how current ongoing inflation is, and the lay offs at companies are occurring right now. The company I work for is barely hiring people when they were hiring all sorts of people 1 year ago, and only currently hiring for the worst shifts that hardly anybody wants, and actually making moves to try to get people to quit. They changed our schedules around. My schedule was changed to weekend 12.5 hour shifts (WTF wants to work 12.5 hour shifts Friday thru Sunday?) when they have known since I was hired in 2021 that I need Saturdays off, and am a DJ. After multiple talks with upper management, they say I am stuck on the schedule they gave me for at least 6 weeks before there is any potential move to the schedule I should have been given. I have been dealt a totally unfair card. Been there for 18 months, and got the worst schedule while others in other departments who only been there 6 months got the best schedule... So I'm going to be earning less money at work thanks to them after this week, way less money
Anyway, enough about my current situation and what I perceive to be a time period to be more frugal with our wallets and carefully consider spending money on expensive items.
If you really want to buy speakers and want Line Array, and don't want to drop BOSE or EV asking prices, I suggest the Harbinger MLS1000. I bet you really like them, and they are cost effective! Also, don't buy them now. Wait until close to Memorial Day Weekend. I bet they will be on sale at least $200 OFF when that sale starts at Musicians friend or Guitar Center.
What's your assessment of a single QSC K10 versus the Harbiner MLS1000? Does the Harbinger have as much volume as the QSC?