Sorry if this is a stupid question but can you utilize 2 powered mixers? I have a small Phonic 740 Plus 440 watt or 220 x 220 and a Yamaha EMX512SC 500 x 500. I know the Phonic isn't the most popular brand but it's been working for us for over 2 years. What I'm wanting to do if possible is to be able to run 4 stage monitors and 4 mains. I just got the Yamaha so I haven't had a chance to use it...maybe this weekend. The Phonic actually does a decent job using it with two 15" monitors and two 15" mains...this was for vocals only. Any suggestions would be helpful...other than "canning" the Phonic completely(lol). It's going to have to do for now unless I just use the Yamaha. Thanks. If it's possible to use both powered mixers I may try to run 2 guitars and vocals through the set up. Thanks again.