This is something I've been thinking about for a while now. I play in a one guitar heavy stoner rock band. We like playing as a 3 piece so another guitarist isn't an option. Currently using a Mini Jubilee combo for band practices which is perfect, got a 2x12 for those louder moments. I was thinking about when we start properly gigging, getting another lower wattage combo and running them in stereo with an a/b-y switcher. This would be to make the songs more dynamic than just using the one main sound all the time - the idea to use just one of the amps set cleaner and more subdued for verses and quieter sections, then kick both in to fill out the sound for the choruses and main riffs. I guess the main thing is - is this sort of thing really going to be that noticeable to the audience and will it have the impact I want? Will it give that bigger 2 guitars sound? Or could I achieve a similar effect using an eq pedal to thin out the sound for the quiet parts - without the hassle of having another amp, ground loop and phase issues etc? I think volume knob adjustments are a bit too subtle for this. Fwiw I don't use much in the way of effects, just a DD7 which I guess would be fun in stereo. I'm more concerned with the song dynamics and making the big bits sound bigger.