RoadRanger and WK;
Thank you both for your help and answers. I really appreciate it. The beauty of analog mixers like my ZEDD, has dedicated stereo 1/4 in and RCA. This makes it very simple to connect most stereo devices, like keyboards, consumer audio, without eating up channels which can be used for mics. As in the ZEDD, 4 XLR and 2 stereo pairs. I guess to save money by adding separate stereo pairs Mackie went with XLR and combo jacks. Which I have made do with for sometime, very happily.