I recently bought a Fulltone Thru Tone AB switcher and have been running two amps at once. What an awesome new realm of tone this has opened. Not sure why I waited so long to try this. Very inspiring sounds! If you haven't tried this - I can't recommend enough. For living room practice, I'm combining a Deluxe Reverb with an Ampeg Gemini. Just awesome! The amps each have their own distinct tones and reverb sounds, and when combined the sound is truly multidimensional. I also patch a looper in, but only to one of the amps, so when the loop plays back there is separation as if there is two guitarists. Awesome tones! I've also tried my Twin Reverb with my Victoria Bassman....very loud, but what a tone. The Twin adds boldness and sparkle, the Bassman adds mids and responsiveness, and together this sound is HUGE. The Twin adds a lot to the sound of any other amp I combine it with, even when at low volume by firming up the bass. I'm so enamored with the tones I'm getting that yesterday I made an impulsive purchase, and have a Victoria 5112 on the way. Pretty much just for the purpose of using to combine with other amps. I can't wait. I'm curious what kind of amp combos you guys have enjoyed running like this. What volumes and dirt levels do you run on each amp? Do you guys run dirt and effects before one of the amps, or both? Please share your experiences with a dual amp setup!