This is something you can try to get a different guitar sound. Connect your electric guitar to a direct box, and go from the balanced output to the recorder. Connect the 1/4" throughput to the guitar amp. Put a mic in front of the guitar amp as you usually do. Play through your amp as usual, only save the 'clean' direct track for later use. You will now have two tracks: 1. the guitar-amp/miced track and 2. the clean, direct from guitar track.
Once you've recorded the clean track, you can run a cable out from your recorder and into your guitar amp. The clean track actually acts as a new instrument. You can now replay the clean track as many times as you like and you can move the mics in the room until you get just the right sound. You can also change the tone of the amp and effects until you find the sound that you like. In the final mix, you can combine these tracks to create rich textures or a very layered sound.
This technique also works well with finding the sweet spot on your amp. Record a clean track, run it through your amp and adjust the mics until you find the best sound. This gets a lot easier when you don't have a guitar strapped on, and you can just press play and move the mics as needed.
