I have a Yamaha EMX5016CF powered mixer and I'm currently using Yamaha passive speakers utilizing the internal power amps (main & monitor) in the mixer. We play a venue that has powered mains and monitors already in place. They have a mixing board, as well but there are always 2 or 3 bad channels on it. The last few times we performed there, I used my mixer, running from the Stereo Out (unbalanced, line level) jacks to the powered mains and the Aux 1 (unbalanced, line level) to the powered floor wedges. Problem is, when I use these outputs, the onboard graphics are no longer usable so I have no way to control feedback except by compromising the eq on the input strips. Can I connect graphic equalizers between these outputs on the mixer and the powered speakers?