#1
ok so i have a Line 6 AX2 212, and i wanted to extend it to a cab, it has the stereo out jack but i know i cant use that to power the speakers, and also, because it is a 2x12, it has the left speaker and right speaker jacks. I somewhere heard that each output is 8 ohms and 50 watts, but how can i run those two 50 watt outs (=100 watts) to one 8 ohm 4x12 cab?
Parker Fly
Epiphone G-400
Gibson Faded SG
Line 6 AX2 212 100 watt
Line 6 Spider 2 75 watt
Ovation Celebrity Deluxe
#2
I 'think' the easiest thing to do is leave one speaker plugged in on combo and then run the other 8 ohm out to your 8 ohm cab.

That is counter intuitive to what I would normally think but because each speaker has it's own jack and each jack is 8 ohms I think you will be OK. I'm not familiar with the AX2 so if that is a tube amp for some reason, then we may want to double check this. If it is solid state you will probably be OK regardless.