Originally Posted by DSL100 Dude

Welcome to the wonderful world of multi-amps!

With a stereo pedal, (I will use my Boss DD-7 as an example) you would plug the guitar in like normal and then output A would go to amp A and output B would go to amp B.

Now if you want to skip stereo effects and just have extreme Marshall goodness then the method I use is the Radial Big Shot ABY and again, output A to amp A and output B to amp B. Radial has a new version that is designed just for running two amp from one guitar. Honestly, I think it the same thing though but may be worth checking out.