Is this possible?
This speaker has an XLR output. https://martin-audio.com/products/loudspeakers/dd12
The idea is that they’re daisy chained to form an array, hence the output, with a single main audio input at the start of the chain.
So...my question is, could I run an XLR to 3.5 cable (stereo or mono?) from the speaker’s XLR output into my battery box>M10 and record from it? Would it be balanced/unbalanced and if so would I need a particular type of cable? Is this going to overload? Would this work at all or will I just blow myself and my equipment up??
Won't need a battery box. M10 is a great choice for this since it can handle a hell of a hot signal.
It's balanced but you can go to unbalanced. Just consider that unbalanced signals of over 6-10 feet can lose a little juice, so if you can keep it balanced until close to the recorder, or simply use short cables, you'll be good. Honestly, with XLR line signals, you might be able to place the deck 20' away from each speaker and not get bad results via unbal.
Now the signal you get will be the signal the speakers are fed. The Martin DD12 you link to has their VU-net remote management capability and has a lot of power to tune a speaker to a room. You hope they are doing this. If the speaker is tuned to the room, then they don't have to send it a "custom" board feed for the room, just a nice balanced mix, like you would appreciate for your recorder! If the speakers are set to "flat" though (or if anyone does this on a speaker without remote management capability like this) then the signal will probably be tuned for the sound of THOSE speakers in THAT room on THAT day. Might make a good tape, or it might only sound right played back on THOSE speakers in THAT room!?
But that's board feeds for ya! Mix it with the sound of the room and you might have something!?