Hello- Going to layout my gear setup in the studio and then follow with some questions. The gear to reference for my questions is as follows: Here is my PA mixer, Peavey XR684, and I attached the manual also: https://assets.peavey.com/literature/manuals/xr684_684plus.pdf Power Specs for the Peavey- 2x200 W @ 4 ohms internal power amplifier OR 420 W @ 8 ohms in bridge mode. My plan is to hook up four different speaker cabinets to the four outputs in the back. Each speaker cabinet is a 10in Phonic with horn: this one- Home :: Speakers :: SEM 710 ; OR seen at guitar center here- http://www.guitarcenter.com/Phonic/S710-10-in-2-Way-Speaker-1274319718850.gc#productDetail Then I plan to take an instrument cable (not a speaker cable, but that is a questions below) and run a line from the stereo out port from the Peavey (in the front part of the main mixer) to a separate power amp and speaker unit (that unit is just a Fender Passport 150 watt system that I plan to use as added monitors and sound reinforcement throughout the studio, speaker cabs are each 2x5.5in, and the speakers will be up on stands near musician ears). Side Note- Not worried about bass in this speaker setup because I will send a lineout from the Ampeg BA 2X10 with a 12in Genz Benz extension to the main mix, which should handle most of the low end rumble in the studio.... If you can't tell, I really prefer the tones, response and volume from multiple 10in speakers as opposed to having bigger 15 or 18in speakers... Also these are primarily used in a smaller home studio setting, but competing with acoustic drums. There seems to be different information about watt handling for the Phonic speaker cabs. So I will go with info from the manufacturer instead of guitar center. Manufacturer says speakers are rated at 80 watts RMS / 160 program (GC says 80 watt program and 160 peak... not sue why the difference in info for program vs peak). Now for the questions: 1- Does anything jump out at people with more experience than I as a very bad idea with this setup? Counter, does this sound like an efficient and quality setup for a relatively new sound guy/musician? 2- In regards to the Peavey outputs in the back of the mixer which have two right (main) and two left (monitor) outputs, what is the best configuration of the speakers. If in a square room with one speaker in each of the four corners, should I: A- send the output from the right (main) to the two front of house speakers (one on the left side of the room and one on the right side of the room) and then the left outs (monitor) going to the speakers at the back of the house (near the drum kit with one on the left and one on the right side of the back of the room). OR B- Send the output from the right (main) to both right side speakers (one in the front and one in back by the drummer) and then the left outs (monitor) to both left side speakers (one in front and one back by drums) 3- In hooking the powered Fender Passport 150 up to the main powered Peavey mixer, should I use a regular line level livewire instrument cable (the Peavey only has the 1/4in out and I do not have an XLR option here), or do I use a speaker cable (I'm pretty sure I read I need to use the instrument cable for this connection). When plugging that line from the Peavey into the the Fender, can I use any of the inputs in the Fender console? Thoughts, opinions, feedback are all welcome. This is my first post, but bass talk forums have in the past helped me to make many purchases. So, thanks to everyone.