I saw a good description on a long defunct recording forum with a pie chart, which I am not going to draw
, but describe a little....when you play your acoustic guitar at home, alone, you have the whole pie. When you sing, you have to share the pie, approx 50/50. Add a large noisy crowd, you have to share that noise space with your guitar sound, so you get even less.
Now, add a drummer, you got nothing. Unless you get get a volume to match the drumkit. Add a whole band and....phew.
Now with some electronics and judicious eq, you need to 'carve' a piece of the pie for your acoustic guitar. Bass and drums occupy mainly this bit, vocals mainly this bit, guitar this bit. (which is usually a very narrow band, hence adding a slab of compression to help make all that guitar sound fit in ...that bit!
FYI:
http://blog.sonicbids.com/the-ultima...mon-instrument
BluesKing777.