Surprised no one has mentioned stereo width yet, especially with the IEM comments. When you're running IEMs in a band context there's so many things competing for the center of your mix (click, vox, bass, kick, snare, talkbacks, etc), that adding your dry+wet guitar signal to the center can make the experience less than optimal since you're competing for space in the center as well as space in the frequency spectrum. Running two amps hard panned can really help with this. Standard stereo with 2 amps places your wet and dry roughly where other stereo instruments like overheads, synths, tracks, audience mics, etc are, but adding the Enhancer block (similar to a stereo widener or imager in a DAW) really pushes them out even further, making a ton of space in the middle for the mono instruments and whatever other stereo sources you have. It even works with one amp though it's not as wide sounding since the dry is the same on both sides, with one side delayed a few ms. Either way, you can more easily hear yourself with less volume than with a typical mono dry. Highly recommended for anyone playing with headphones at home or IEMs live.