I have 2 Behringsr studio control monitors which are excellent for switching monitors options when mixing sound. It also serves as a interface for your DAW. They make my speakers sound better and cleaner than anything before that I've used. I have one that I currently am using that has one bad XLR input but is still usable with the 1/4 inch within it. The other input works fine as I run my Focusrite straight thru and use it as a monitor switcher. Sounds excellent. The used one I will sell for 150.00 and I have a new one in the box for 220.00. I will use whichever one does not get sold as this controller enhances my sound that is night and day what it was before.
Also for $45 I have a Rane ME 15 eq rack component which has 1/4 in/out and for $65 a Peavey EQ31 which has 1/4 inch and XLR inputs. Both in great condition and not missing any knobs or anything. Also have a Classic Unity Series 2000 passive mixer for 125.00. This would be great backup to run somewhere at a practice place to keep your main gear packed for the road. All very clean. Email me for more info. Will take cash and can meet you later in the week around OKC or the Shawnee area.