Originally posted by SoS
I'm a bit unsure where there the "theory" part is in guitaring . . .

Theory is everything. It is the explanation for why certains things sound good and others are cacophony. It is the relationship between chords, scales, and intervals. Whenever you play guitar you are using theory, whether you know it or not.

For example, you don't necessarily have to know anything about theory to play a G chord, but when you play one you are using theory. You're making a major triad from a major scale, and on the guitar, you'd no doubt be using some sort of inversion or repeated notes.

Theory doesn't have anything to do with the technical side of guitar. (i.e. pickups, amps, guitar design and maintainence) It's just an explanation for music and why things sound the way they sound.