This technique is adapted from Fett of The Performing Songwriter. Aside from a direct sound recording input in the other room of a studio, multiple mics can be used on the amp to capture sounds from different angles, just like in acoustic guitar recording. You may experiment on different ways that may even sound weird as a normal recording concept but they’re definitely worth a try. You just might be able to get that elusive sound you’ve been trying to achieve for years, or a totally new sound that you never could have imagined.
Full Article: Electric Guitar Recording Tips