I use both the sx300 and the psx1000 powered mixer. I also use the sb121a powered sub. The sx300 non powered speakers sound excellent driven by the psx1000 powered mixer. I am very happy with this system. I use this mixer with a 5 piece band in which I use one chanel for the mains and one for the monitor and everything works great. I have tried out the mackie 808s before I got the psx1000. I liked the psx1000 much better for its patching capabilities and also the digital efects sounded better to me.