Put Community MVP12M into Google and the second listed result goes to:
MVP12M spec PDF
4th item down on the left of the screen.
SO from that PDF is looks like that that power amplifier is only good enough to power one of those monitors?
I didn't know that Fender made DI boxes; your link gives a 404.
Without knowing the exact make and model (your link didn't give that info), here's a few things to try.
1. turn the monitors off. Let's concentrate with just getting the guitar into the desk first and we can worry about where it's sent later.
2. plug the output from the acoustic guitar into the jack input on the DI box, using a guitar cable that you know works.
3. Using a known working mic lead, plug one end into the DI box output and the other into the snake.
4. disengage any pad switches on the DI box.
5. go to the other end of the snake and plug the corresponding output connector into the mixing desk.
6. have someone play the guitar.
7. PFL the guitar channel and gradually bring up the gain until it registers nicely on the desk (gain structure is another ball game).
As far as the DI boxes go their are four switches on them. on the top next to the HI-z out their is one that says "Ground" and "Lift" Near the bottom where their are the input output jacks it says "Instr" Spkr" which I assume means instrument and speaker? The guitar works for sure. Like I said when the guitar is unplugged and the channel is hot you can here the static that comes through the monitors. As soon as you plug it in you have nothing. I am going back out their tomorrow and I will do some more testing.
Do you have a cable tester?
I do have a cable tester and I should be using it..
Sorry, just read the 'using two DI boxes bit'.
How are you connecting them?
You aren't using adapters to convert the mic XLR connector to a jack so that it will go into the DI box, are you?
I am running the main guitar cable in to the input channel of the jack. Then another guitar cable to the input of the other DI box jack and then running a HI-Z out mic cable to the snake.
... and something I thought of overnight (!)... if it's an 'active' box, check that the battery is good OR that you have phantom-power engaged for that particular mic input (or both... won't do any harm if both power-sources are "on").
I got really messy when I was re wiring things..their is a extremely good chance the phantom power on the board was off. Since the DI boxes are not powered then selves..
Jordan: did you find anyone from another church locally that could give any help/advice? I think you need someone 'on the spot' rather than us trying to give advice on a forum from thousands of miles away!
I sure did! The guy who originally trained me is coming out tomorrow to help me get everything working and ready for Sunday. Even though giving advice over the forums is hard I enjoy it and consider it a good learning experience. Allow me to get hands on and make my own mistakes.
UPDATE: Just had a rummage around on Fender.com and I THINK the DI box pic that Jordan was trying to show us is of a generic, basic passive DI box. (Couldn't see four switches though...)
The first DI box shown here is one type of DI box we have;
This one however only has the ground and lift to it. Not sure why or what the difference is for that fact..
Got another question for you guys. The mains or FOH seem to control one another. What I mean by that is if I turn up the right the left also goes up. Same thing with the left. I followed the wires and their on two different input outputs on the board and in the power amplifier then selves. Which is what confuses me. Also the balance on the board is set to default. So their now sending signal to each others speaker.
Also when the system was set up they ran the mains through DI boxes. I tested with out them and didn't hear any difference but I am curious as to why they are like that in the first place and is it needed?