Double Tracking Guitars and Quad Tracking Guitars
 
Double tracking guitars and quad tracking guitars is 2 of the most famous ways to pan the guitars in your stereo field. Many people argue about which is the best technique. I can tell you one thing. There's no best technique. It really depends on the song and the sound that you want to achieve. Full Source Article Here: http://musicproductiontips.net/double-tracking-guitars-and-quad-tracking-guitars/